/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:54:38,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:54:38,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:54:38,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:54:38,204 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 04:54:38,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:54:38,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:54:38,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:54:38,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:54:38,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:54:38,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:54:38,232 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:54:38,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:54:38,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:54:38,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:54:38,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:54:38,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:54:38,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:54:38,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:54:38,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:54:38,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:54:38,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:54:38,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:54:38,456 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:54:38,456 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:54:38,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl [2021-06-05 04:54:38,457 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl' [2021-06-05 04:54:38,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:54:38,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:54:38,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:54:38,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:54:38,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:54:38,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:54:38,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:54:38,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:54:38,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:54:38,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... [2021-06-05 04:54:38,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:54:38,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:54:38,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:54:38,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:54:38,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:54:38,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:54:38,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:54:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:54:38,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:54:38,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:54:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:54:38,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:54:38,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:54:38,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:54:38,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 04:54:38,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 04:54:38,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 04:54:38,593 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 04:54:38,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:54:38,908 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 04:54:38,910 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:54:38 BoogieIcfgContainer [2021-06-05 04:54:38,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:54:38,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:54:38,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:54:38,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:54:38,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:54:38" (1/2) ... [2021-06-05 04:54:38,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3622cc49 and model type word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:54:38, skipping insertion in model container [2021-06-05 04:54:38,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:54:38" (2/2) ... [2021-06-05 04:54:38,927 INFO L111 eAbstractionObserver]: Analyzing ICFG word-subst.wvr.bpl [2021-06-05 04:54:38,930 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:54:38,931 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:54:38,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:54:38,931 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:54:38,952 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 04:54:38,965 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 04:54:38,978 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:54:38,979 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:54:38,979 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:54:38,979 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:54:38,979 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:54:38,979 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:54:38,979 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:54:38,979 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:54:38,985 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-06-05 04:54:38,998 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:54:39,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:39,009 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:39,010 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash -200100504, now seen corresponding path program 1 times [2021-06-05 04:54:39,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:39,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382200396] [2021-06-05 04:54:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:39,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382200396] [2021-06-05 04:54:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382200396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:39,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:39,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:39,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792046967] [2021-06-05 04:54:39,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:39,221 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:39,269 INFO L93 Difference]: Finished difference Result 171 states and 561 transitions. [2021-06-05 04:54:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:54:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:54:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:39,279 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:54:39,279 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:54:39,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:54:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-06-05 04:54:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.2990654205607477) internal successors, (353), 107 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 353 transitions. [2021-06-05 04:54:39,326 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 353 transitions. Word has length 14 [2021-06-05 04:54:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:39,326 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 353 transitions. [2021-06-05 04:54:39,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 353 transitions. [2021-06-05 04:54:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:54:39,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:39,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:39,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:54:39,330 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:39,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1713787741, now seen corresponding path program 1 times [2021-06-05 04:54:39,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:39,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105058454] [2021-06-05 04:54:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:39,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105058454] [2021-06-05 04:54:39,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105058454] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:39,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:39,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:54:39,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719361648] [2021-06-05 04:54:39,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:54:39,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:54:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:39,401 INFO L87 Difference]: Start difference. First operand 108 states and 353 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:39,499 INFO L93 Difference]: Finished difference Result 172 states and 504 transitions. [2021-06-05 04:54:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:39,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:54:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:39,504 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:54:39,504 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:54:39,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:54:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:54:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-06-05 04:54:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 3.19672131147541) internal successors, (390), 122 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 390 transitions. [2021-06-05 04:54:39,518 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 390 transitions. Word has length 15 [2021-06-05 04:54:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:39,519 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 390 transitions. [2021-06-05 04:54:39,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 390 transitions. [2021-06-05 04:54:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:54:39,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:39,520 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:39,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:54:39,520 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1520780803, now seen corresponding path program 2 times [2021-06-05 04:54:39,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:39,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595221898] [2021-06-05 04:54:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:39,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595221898] [2021-06-05 04:54:39,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595221898] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:39,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:39,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:54:39,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836884968] [2021-06-05 04:54:39,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:54:39,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:54:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:39,569 INFO L87 Difference]: Start difference. First operand 123 states and 390 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:39,661 INFO L93 Difference]: Finished difference Result 179 states and 520 transitions. [2021-06-05 04:54:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:54:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:39,664 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:54:39,666 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:54:39,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:54:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:54:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-06-05 04:54:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 3.1538461538461537) internal successors, (410), 130 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 410 transitions. [2021-06-05 04:54:39,684 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 410 transitions. Word has length 15 [2021-06-05 04:54:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:39,684 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 410 transitions. [2021-06-05 04:54:39,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 410 transitions. [2021-06-05 04:54:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:54:39,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:39,685 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:39,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:54:39,685 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash 372369077, now seen corresponding path program 3 times [2021-06-05 04:54:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:39,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547129287] [2021-06-05 04:54:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:39,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547129287] [2021-06-05 04:54:39,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547129287] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:39,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:39,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:54:39,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471466987] [2021-06-05 04:54:39,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:54:39,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:39,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:54:39,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:39,803 INFO L87 Difference]: Start difference. First operand 131 states and 410 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:39,890 INFO L93 Difference]: Finished difference Result 235 states and 657 transitions. [2021-06-05 04:54:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:39,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:54:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:39,891 INFO L225 Difference]: With dead ends: 235 [2021-06-05 04:54:39,892 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:54:39,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:54:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:54:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 135. [2021-06-05 04:54:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.1492537313432836) internal successors, (422), 134 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 422 transitions. [2021-06-05 04:54:39,901 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 422 transitions. Word has length 15 [2021-06-05 04:54:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:39,901 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 422 transitions. [2021-06-05 04:54:39,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 422 transitions. [2021-06-05 04:54:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:54:39,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:39,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:39,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:54:39,905 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash 384286855, now seen corresponding path program 4 times [2021-06-05 04:54:39,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:39,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204993471] [2021-06-05 04:54:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:39,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:39,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204993471] [2021-06-05 04:54:39,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204993471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:39,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:39,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:54:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964759609] [2021-06-05 04:54:39,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:54:39,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:54:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:39,979 INFO L87 Difference]: Start difference. First operand 135 states and 422 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,063 INFO L93 Difference]: Finished difference Result 194 states and 550 transitions. [2021-06-05 04:54:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:54:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,064 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:54:40,064 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:54:40,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:54:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:54:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2021-06-05 04:54:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.1343283582089554) internal successors, (420), 134 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 420 transitions. [2021-06-05 04:54:40,069 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 420 transitions. Word has length 15 [2021-06-05 04:54:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,069 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 420 transitions. [2021-06-05 04:54:40,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 420 transitions. [2021-06-05 04:54:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:54:40,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 04:54:40,071 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1046340473, now seen corresponding path program 5 times [2021-06-05 04:54:40,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668268302] [2021-06-05 04:54:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668268302] [2021-06-05 04:54:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668268302] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:54:40,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531794530] [2021-06-05 04:54:40,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:54:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:54:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,164 INFO L87 Difference]: Start difference. First operand 135 states and 420 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,250 INFO L93 Difference]: Finished difference Result 228 states and 638 transitions. [2021-06-05 04:54:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:54:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,251 INFO L225 Difference]: With dead ends: 228 [2021-06-05 04:54:40,252 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:54:40,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:54:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:54:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 137. [2021-06-05 04:54:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 427 transitions. [2021-06-05 04:54:40,257 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 427 transitions. Word has length 15 [2021-06-05 04:54:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,257 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 427 transitions. [2021-06-05 04:54:40,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 427 transitions. [2021-06-05 04:54:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:54:40,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,257 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:54:40,258 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash -964122021, now seen corresponding path program 6 times [2021-06-05 04:54:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156055979] [2021-06-05 04:54:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156055979] [2021-06-05 04:54:40,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156055979] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:54:40,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747639750] [2021-06-05 04:54:40,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:54:40,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:54:40,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,319 INFO L87 Difference]: Start difference. First operand 137 states and 427 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,375 INFO L93 Difference]: Finished difference Result 195 states and 552 transitions. [2021-06-05 04:54:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:54:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,376 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:54:40,376 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:54:40,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:54:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:54:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-06-05 04:54:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.125) internal successors, (425), 136 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 425 transitions. [2021-06-05 04:54:40,380 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 425 transitions. Word has length 15 [2021-06-05 04:54:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,380 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 425 transitions. [2021-06-05 04:54:40,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 425 transitions. [2021-06-05 04:54:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 04:54:40,381 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1568921575, now seen corresponding path program 1 times [2021-06-05 04:54:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836947201] [2021-06-05 04:54:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836947201] [2021-06-05 04:54:40,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836947201] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090062919] [2021-06-05 04:54:40,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,404 INFO L87 Difference]: Start difference. First operand 137 states and 425 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,421 INFO L93 Difference]: Finished difference Result 203 states and 586 transitions. [2021-06-05 04:54:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,423 INFO L225 Difference]: With dead ends: 203 [2021-06-05 04:54:40,423 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 04:54:40,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 04:54:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2021-06-05 04:54:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.1185185185185187) internal successors, (421), 135 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 421 transitions. [2021-06-05 04:54:40,426 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 421 transitions. Word has length 16 [2021-06-05 04:54:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,427 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 421 transitions. [2021-06-05 04:54:40,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 421 transitions. [2021-06-05 04:54:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,427 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 04:54:40,427 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1557107456, now seen corresponding path program 1 times [2021-06-05 04:54:40,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541564187] [2021-06-05 04:54:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541564187] [2021-06-05 04:54:40,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541564187] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51390779] [2021-06-05 04:54:40,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,441 INFO L87 Difference]: Start difference. First operand 136 states and 421 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,461 INFO L93 Difference]: Finished difference Result 194 states and 542 transitions. [2021-06-05 04:54:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,463 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:54:40,463 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:54:40,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:54:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2021-06-05 04:54:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.022222222222222) internal successors, (408), 135 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 408 transitions. [2021-06-05 04:54:40,466 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 408 transitions. Word has length 16 [2021-06-05 04:54:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,466 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 408 transitions. [2021-06-05 04:54:40,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 408 transitions. [2021-06-05 04:54:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,467 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 04:54:40,467 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1420564495, now seen corresponding path program 2 times [2021-06-05 04:54:40,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475445299] [2021-06-05 04:54:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475445299] [2021-06-05 04:54:40,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475445299] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404605484] [2021-06-05 04:54:40,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,480 INFO L87 Difference]: Start difference. First operand 136 states and 408 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,496 INFO L93 Difference]: Finished difference Result 205 states and 567 transitions. [2021-06-05 04:54:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,497 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:54:40,497 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:54:40,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:54:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 114. [2021-06-05 04:54:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.920353982300885) internal successors, (330), 113 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 330 transitions. [2021-06-05 04:54:40,500 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 330 transitions. Word has length 16 [2021-06-05 04:54:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,500 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 330 transitions. [2021-06-05 04:54:40,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 330 transitions. [2021-06-05 04:54:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 04:54:40,501 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1521275701, now seen corresponding path program 3 times [2021-06-05 04:54:40,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551735332] [2021-06-05 04:54:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551735332] [2021-06-05 04:54:40,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551735332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761928157] [2021-06-05 04:54:40,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,513 INFO L87 Difference]: Start difference. First operand 114 states and 330 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,524 INFO L93 Difference]: Finished difference Result 171 states and 460 transitions. [2021-06-05 04:54:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:54:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,525 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:54:40,525 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:54:40,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:54:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2021-06-05 04:54:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.908256880733945) internal successors, (317), 109 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 317 transitions. [2021-06-05 04:54:40,528 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 317 transitions. Word has length 16 [2021-06-05 04:54:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,528 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 317 transitions. [2021-06-05 04:54:40,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 317 transitions. [2021-06-05 04:54:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 04:54:40,529 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1372165464, now seen corresponding path program 2 times [2021-06-05 04:54:40,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714184370] [2021-06-05 04:54:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714184370] [2021-06-05 04:54:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714184370] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98336854] [2021-06-05 04:54:40,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,541 INFO L87 Difference]: Start difference. First operand 110 states and 317 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,559 INFO L93 Difference]: Finished difference Result 179 states and 482 transitions. [2021-06-05 04:54:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:54:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,566 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:54:40,566 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 04:54:40,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 04:54:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 114. [2021-06-05 04:54:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8584070796460175) internal successors, (323), 113 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-06-05 04:54:40,570 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 16 [2021-06-05 04:54:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,570 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-06-05 04:54:40,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-06-05 04:54:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,571 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 04:54:40,571 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,571 INFO L82 PathProgramCache]: Analyzing trace with hash -507426732, now seen corresponding path program 3 times [2021-06-05 04:54:40,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318885273] [2021-06-05 04:54:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318885273] [2021-06-05 04:54:40,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318885273] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450591245] [2021-06-05 04:54:40,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,595 INFO L87 Difference]: Start difference. First operand 114 states and 323 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,615 INFO L93 Difference]: Finished difference Result 156 states and 416 transitions. [2021-06-05 04:54:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:54:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,616 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:54:40,616 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:54:40,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:54:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-06-05 04:54:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.889908256880734) internal successors, (315), 109 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 315 transitions. [2021-06-05 04:54:40,619 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 315 transitions. Word has length 16 [2021-06-05 04:54:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,619 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 315 transitions. [2021-06-05 04:54:40,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 315 transitions. [2021-06-05 04:54:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 04:54:40,620 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1294148210, now seen corresponding path program 4 times [2021-06-05 04:54:40,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640106958] [2021-06-05 04:54:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640106958] [2021-06-05 04:54:40,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640106958] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956914886] [2021-06-05 04:54:40,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,634 INFO L87 Difference]: Start difference. First operand 110 states and 315 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,644 INFO L93 Difference]: Finished difference Result 151 states and 405 transitions. [2021-06-05 04:54:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:54:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,645 INFO L225 Difference]: With dead ends: 151 [2021-06-05 04:54:40,645 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:54:40,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:54:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2021-06-05 04:54:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 312 transitions. [2021-06-05 04:54:40,648 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 312 transitions. Word has length 16 [2021-06-05 04:54:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,648 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 312 transitions. [2021-06-05 04:54:40,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 312 transitions. [2021-06-05 04:54:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:54:40,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 04:54:40,649 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1904685263, now seen corresponding path program 4 times [2021-06-05 04:54:40,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793759077] [2021-06-05 04:54:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793759077] [2021-06-05 04:54:40,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793759077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:54:40,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523226889] [2021-06-05 04:54:40,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:54:40,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:54:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:54:40,662 INFO L87 Difference]: Start difference. First operand 110 states and 312 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,670 INFO L93 Difference]: Finished difference Result 116 states and 321 transitions. [2021-06-05 04:54:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:54:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:54:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,671 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:54:40,671 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:54:40,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:54:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:54:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-06-05 04:54:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-06-05 04:54:40,673 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-06-05 04:54:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,673 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-06-05 04:54:40,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-06-05 04:54:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:40,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 04:54:40,674 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1361223606, now seen corresponding path program 1 times [2021-06-05 04:54:40,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15030706] [2021-06-05 04:54:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15030706] [2021-06-05 04:54:40,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15030706] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:40,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336971344] [2021-06-05 04:54:40,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:40,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:40,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:40,736 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:40,852 INFO L93 Difference]: Finished difference Result 265 states and 721 transitions. [2021-06-05 04:54:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:40,854 INFO L225 Difference]: With dead ends: 265 [2021-06-05 04:54:40,854 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 04:54:40,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 04:54:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-06-05 04:54:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7928571428571427) internal successors, (391), 140 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-06-05 04:54:40,858 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-06-05 04:54:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:40,858 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-06-05 04:54:40,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-06-05 04:54:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:40,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:40,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:40,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 04:54:40,859 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:40,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1726190618, now seen corresponding path program 2 times [2021-06-05 04:54:40,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:40,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214637849] [2021-06-05 04:54:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:40,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:40,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214637849] [2021-06-05 04:54:40,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214637849] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:40,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:40,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:40,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584640432] [2021-06-05 04:54:40,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:40,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:40,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:40,922 INFO L87 Difference]: Start difference. First operand 141 states and 391 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:41,085 INFO L93 Difference]: Finished difference Result 298 states and 795 transitions. [2021-06-05 04:54:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:41,086 INFO L225 Difference]: With dead ends: 298 [2021-06-05 04:54:41,086 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 04:54:41,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 04:54:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-06-05 04:54:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-06-05 04:54:41,092 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-06-05 04:54:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:41,092 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-06-05 04:54:41,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-06-05 04:54:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:41,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:41,093 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:41,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 04:54:41,093 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash 870056290, now seen corresponding path program 3 times [2021-06-05 04:54:41,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:41,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347069369] [2021-06-05 04:54:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:41,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:41,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347069369] [2021-06-05 04:54:41,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347069369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:41,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:41,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:41,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065765167] [2021-06-05 04:54:41,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:41,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:41,172 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:41,342 INFO L93 Difference]: Finished difference Result 281 states and 763 transitions. [2021-06-05 04:54:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:41,344 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:54:41,344 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 04:54:41,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 04:54:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-06-05 04:54:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-06-05 04:54:41,347 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-06-05 04:54:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:41,348 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-06-05 04:54:41,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-06-05 04:54:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:41,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:41,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:41,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 04:54:41,348 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2059322360, now seen corresponding path program 4 times [2021-06-05 04:54:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690186080] [2021-06-05 04:54:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:41,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:41,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690186080] [2021-06-05 04:54:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690186080] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:41,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:41,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:41,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634751868] [2021-06-05 04:54:41,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:41,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:41,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:41,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:41,399 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:41,507 INFO L93 Difference]: Finished difference Result 289 states and 784 transitions. [2021-06-05 04:54:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:41,510 INFO L225 Difference]: With dead ends: 289 [2021-06-05 04:54:41,510 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 04:54:41,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 04:54:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-06-05 04:54:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-06-05 04:54:41,514 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-06-05 04:54:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:41,514 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-06-05 04:54:41,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-06-05 04:54:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:41,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:41,514 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:41,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 04:54:41,514 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2033546876, now seen corresponding path program 5 times [2021-06-05 04:54:41,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:41,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185969646] [2021-06-05 04:54:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:41,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:41,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185969646] [2021-06-05 04:54:41,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185969646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:41,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:41,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:41,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201484156] [2021-06-05 04:54:41,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:41,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:41,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:41,571 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:41,726 INFO L93 Difference]: Finished difference Result 322 states and 859 transitions. [2021-06-05 04:54:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:41,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:41,728 INFO L225 Difference]: With dead ends: 322 [2021-06-05 04:54:41,728 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 04:54:41,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 04:54:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-06-05 04:54:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.8322981366459627) internal successors, (456), 161 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-06-05 04:54:41,732 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-06-05 04:54:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:41,732 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-06-05 04:54:41,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-06-05 04:54:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:41,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:41,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:41,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 04:54:41,732 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:41,733 INFO L82 PathProgramCache]: Analyzing trace with hash 334826488, now seen corresponding path program 6 times [2021-06-05 04:54:41,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:41,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147962484] [2021-06-05 04:54:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:41,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:41,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147962484] [2021-06-05 04:54:41,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147962484] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:41,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:41,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:41,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244295840] [2021-06-05 04:54:41,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:41,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:41,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:41,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:41,785 INFO L87 Difference]: Start difference. First operand 162 states and 456 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:41,960 INFO L93 Difference]: Finished difference Result 299 states and 814 transitions. [2021-06-05 04:54:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:41,962 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:54:41,962 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 04:54:41,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:41,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 04:54:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-06-05 04:54:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-06-05 04:54:41,967 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-06-05 04:54:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:41,967 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-06-05 04:54:41,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-06-05 04:54:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:41,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:41,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:41,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 04:54:41,968 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2035892590, now seen corresponding path program 7 times [2021-06-05 04:54:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:41,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506242722] [2021-06-05 04:54:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:42,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:42,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506242722] [2021-06-05 04:54:42,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506242722] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:42,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:42,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:42,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806255265] [2021-06-05 04:54:42,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:42,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:42,033 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:42,209 INFO L93 Difference]: Finished difference Result 389 states and 1040 transitions. [2021-06-05 04:54:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:42,210 INFO L225 Difference]: With dead ends: 389 [2021-06-05 04:54:42,210 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 04:54:42,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 04:54:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-06-05 04:54:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.8484848484848486) internal successors, (470), 165 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-06-05 04:54:42,215 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-06-05 04:54:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:42,215 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-06-05 04:54:42,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-06-05 04:54:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:42,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:42,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:42,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 04:54:42,215 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash -828339518, now seen corresponding path program 8 times [2021-06-05 04:54:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:42,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707635473] [2021-06-05 04:54:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:42,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:42,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707635473] [2021-06-05 04:54:42,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707635473] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:42,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:42,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:42,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622652633] [2021-06-05 04:54:42,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:42,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:42,271 INFO L87 Difference]: Start difference. First operand 166 states and 470 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:42,455 INFO L93 Difference]: Finished difference Result 398 states and 1066 transitions. [2021-06-05 04:54:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:42,456 INFO L225 Difference]: With dead ends: 398 [2021-06-05 04:54:42,456 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 04:54:42,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 04:54:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-06-05 04:54:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.880952380952381) internal successors, (484), 168 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-06-05 04:54:42,461 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-06-05 04:54:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:42,461 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-06-05 04:54:42,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-06-05 04:54:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:42,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:42,461 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:42,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 04:54:42,461 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1767907390, now seen corresponding path program 9 times [2021-06-05 04:54:42,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:42,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370761001] [2021-06-05 04:54:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:42,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:42,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370761001] [2021-06-05 04:54:42,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370761001] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:42,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:42,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:42,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128464968] [2021-06-05 04:54:42,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:42,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:42,518 INFO L87 Difference]: Start difference. First operand 169 states and 484 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:42,690 INFO L93 Difference]: Finished difference Result 405 states and 1082 transitions. [2021-06-05 04:54:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:42,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:42,692 INFO L225 Difference]: With dead ends: 405 [2021-06-05 04:54:42,692 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:54:42,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:54:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-06-05 04:54:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.825) internal successors, (452), 160 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-06-05 04:54:42,696 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-06-05 04:54:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:42,696 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-06-05 04:54:42,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-06-05 04:54:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:42,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:42,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:42,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 04:54:42,697 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:42,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1043349262, now seen corresponding path program 10 times [2021-06-05 04:54:42,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:42,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339034294] [2021-06-05 04:54:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:42,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:42,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339034294] [2021-06-05 04:54:42,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339034294] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:42,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:42,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:42,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790520396] [2021-06-05 04:54:42,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:42,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:42,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:42,737 INFO L87 Difference]: Start difference. First operand 161 states and 452 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:42,822 INFO L93 Difference]: Finished difference Result 340 states and 918 transitions. [2021-06-05 04:54:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:42,824 INFO L225 Difference]: With dead ends: 340 [2021-06-05 04:54:42,824 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 04:54:42,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 04:54:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-06-05 04:54:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.841463414634146) internal successors, (466), 164 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-06-05 04:54:42,832 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-06-05 04:54:42,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:42,832 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-06-05 04:54:42,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-06-05 04:54:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:42,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:42,833 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:42,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 04:54:42,833 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1480345592, now seen corresponding path program 11 times [2021-06-05 04:54:42,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:42,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327992846] [2021-06-05 04:54:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:42,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:42,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327992846] [2021-06-05 04:54:42,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327992846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:42,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:42,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:42,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220057303] [2021-06-05 04:54:42,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:42,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:42,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:42,889 INFO L87 Difference]: Start difference. First operand 165 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:43,006 INFO L93 Difference]: Finished difference Result 335 states and 909 transitions. [2021-06-05 04:54:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:43,007 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:54:43,007 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 04:54:43,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 04:54:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-06-05 04:54:43,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-06-05 04:54:43,011 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-06-05 04:54:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:43,011 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-06-05 04:54:43,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-06-05 04:54:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:43,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:43,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:43,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 04:54:43,012 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash -145439044, now seen corresponding path program 12 times [2021-06-05 04:54:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:43,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690521204] [2021-06-05 04:54:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690521204] [2021-06-05 04:54:43,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690521204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:43,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:43,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:43,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670923820] [2021-06-05 04:54:43,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:43,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:43,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:43,057 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:43,174 INFO L93 Difference]: Finished difference Result 318 states and 879 transitions. [2021-06-05 04:54:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:43,176 INFO L225 Difference]: With dead ends: 318 [2021-06-05 04:54:43,176 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 04:54:43,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 04:54:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-06-05 04:54:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-06-05 04:54:43,179 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-06-05 04:54:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:43,180 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-06-05 04:54:43,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-06-05 04:54:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:43,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:43,180 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:43,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 04:54:43,180 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:43,181 INFO L82 PathProgramCache]: Analyzing trace with hash 161256120, now seen corresponding path program 13 times [2021-06-05 04:54:43,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:43,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774159856] [2021-06-05 04:54:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:43,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774159856] [2021-06-05 04:54:43,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774159856] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:43,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:43,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:43,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723709709] [2021-06-05 04:54:43,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:43,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:43,222 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:43,327 INFO L93 Difference]: Finished difference Result 385 states and 1046 transitions. [2021-06-05 04:54:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:43,329 INFO L225 Difference]: With dead ends: 385 [2021-06-05 04:54:43,329 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 04:54:43,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 04:54:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-06-05 04:54:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-05 04:54:43,333 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-05 04:54:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:43,333 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-05 04:54:43,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-05 04:54:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:43,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:43,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:43,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 04:54:43,334 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:43,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1057379240, now seen corresponding path program 14 times [2021-06-05 04:54:43,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:43,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026137173] [2021-06-05 04:54:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:43,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026137173] [2021-06-05 04:54:43,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026137173] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:43,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:43,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:43,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739897706] [2021-06-05 04:54:43,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:43,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:43,377 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:43,495 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-06-05 04:54:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:43,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:43,497 INFO L225 Difference]: With dead ends: 383 [2021-06-05 04:54:43,497 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 04:54:43,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 04:54:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-06-05 04:54:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-05 04:54:43,501 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-05 04:54:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:43,502 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-05 04:54:43,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-05 04:54:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:43,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:43,502 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:43,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 04:54:43,502 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1150316668, now seen corresponding path program 15 times [2021-06-05 04:54:43,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:43,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838358814] [2021-06-05 04:54:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838358814] [2021-06-05 04:54:43,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838358814] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:43,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:43,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785570926] [2021-06-05 04:54:43,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:43,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:43,559 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:43,708 INFO L93 Difference]: Finished difference Result 392 states and 1055 transitions. [2021-06-05 04:54:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:43,710 INFO L225 Difference]: With dead ends: 392 [2021-06-05 04:54:43,710 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 04:54:43,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 04:54:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-06-05 04:54:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.909090909090909) internal successors, (512), 176 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-06-05 04:54:43,714 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-06-05 04:54:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:43,714 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-06-05 04:54:43,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-06-05 04:54:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:43,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:43,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:43,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 04:54:43,714 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash -19872328, now seen corresponding path program 16 times [2021-06-05 04:54:43,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:43,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103641323] [2021-06-05 04:54:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:43,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103641323] [2021-06-05 04:54:43,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103641323] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:43,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:43,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:43,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850268382] [2021-06-05 04:54:43,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:43,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:43,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:43,773 INFO L87 Difference]: Start difference. First operand 177 states and 512 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:43,919 INFO L93 Difference]: Finished difference Result 376 states and 1032 transitions. [2021-06-05 04:54:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:43,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:43,920 INFO L225 Difference]: With dead ends: 376 [2021-06-05 04:54:43,920 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 04:54:43,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 04:54:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-06-05 04:54:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-05 04:54:43,924 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-05 04:54:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:43,924 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-05 04:54:43,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-05 04:54:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:43,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:43,925 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:43,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 04:54:43,925 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:43,925 INFO L82 PathProgramCache]: Analyzing trace with hash -36809380, now seen corresponding path program 17 times [2021-06-05 04:54:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:43,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947248806] [2021-06-05 04:54:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:43,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947248806] [2021-06-05 04:54:43,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947248806] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:43,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:43,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:43,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925135635] [2021-06-05 04:54:43,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:43,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:43,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:43,969 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:44,077 INFO L93 Difference]: Finished difference Result 364 states and 991 transitions. [2021-06-05 04:54:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:44,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:44,079 INFO L225 Difference]: With dead ends: 364 [2021-06-05 04:54:44,079 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 04:54:44,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 04:54:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-06-05 04:54:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8971428571428572) internal successors, (507), 175 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-06-05 04:54:44,082 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-06-05 04:54:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:44,083 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-06-05 04:54:44,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-06-05 04:54:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:44,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:44,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:44,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 04:54:44,083 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1103474456, now seen corresponding path program 18 times [2021-06-05 04:54:44,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:44,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378065043] [2021-06-05 04:54:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:44,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:44,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378065043] [2021-06-05 04:54:44,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378065043] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:44,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:44,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:44,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542980661] [2021-06-05 04:54:44,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:44,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:44,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:44,121 INFO L87 Difference]: Start difference. First operand 176 states and 507 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:44,230 INFO L93 Difference]: Finished difference Result 343 states and 953 transitions. [2021-06-05 04:54:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:44,231 INFO L225 Difference]: With dead ends: 343 [2021-06-05 04:54:44,231 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 04:54:44,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 04:54:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-06-05 04:54:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-06-05 04:54:44,234 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-06-05 04:54:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:44,235 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-06-05 04:54:44,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-06-05 04:54:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:44,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:44,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:44,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-05 04:54:44,235 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:44,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1622951230, now seen corresponding path program 19 times [2021-06-05 04:54:44,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:44,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834668832] [2021-06-05 04:54:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:44,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:44,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834668832] [2021-06-05 04:54:44,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834668832] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:44,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:44,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:44,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614874968] [2021-06-05 04:54:44,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:44,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:44,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:44,282 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:44,358 INFO L93 Difference]: Finished difference Result 360 states and 983 transitions. [2021-06-05 04:54:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:44,360 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:54:44,360 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 04:54:44,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 04:54:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-06-05 04:54:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-05 04:54:44,363 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-05 04:54:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:44,363 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-05 04:54:44,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-05 04:54:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:44,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:44,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:44,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-05 04:54:44,364 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:44,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1422092646, now seen corresponding path program 20 times [2021-06-05 04:54:44,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:44,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116114313] [2021-06-05 04:54:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:44,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:44,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116114313] [2021-06-05 04:54:44,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116114313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:44,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:44,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111514966] [2021-06-05 04:54:44,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:44,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:44,411 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:44,532 INFO L93 Difference]: Finished difference Result 377 states and 1017 transitions. [2021-06-05 04:54:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:44,534 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:54:44,534 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 04:54:44,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 04:54:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-06-05 04:54:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-06-05 04:54:44,538 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-06-05 04:54:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:44,538 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-06-05 04:54:44,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-06-05 04:54:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:44,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:44,538 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:44,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-05 04:54:44,538 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash 203457286, now seen corresponding path program 21 times [2021-06-05 04:54:44,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:44,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677533786] [2021-06-05 04:54:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:44,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:44,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677533786] [2021-06-05 04:54:44,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677533786] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:44,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:44,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:44,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695066156] [2021-06-05 04:54:44,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:44,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:44,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:44,583 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:44,709 INFO L93 Difference]: Finished difference Result 354 states and 972 transitions. [2021-06-05 04:54:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:44,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:44,711 INFO L225 Difference]: With dead ends: 354 [2021-06-05 04:54:44,711 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 04:54:44,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 04:54:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-06-05 04:54:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-05 04:54:44,714 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-05 04:54:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:44,714 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-05 04:54:44,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-05 04:54:44,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:44,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:44,715 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:44,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-05 04:54:44,715 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1026845314, now seen corresponding path program 22 times [2021-06-05 04:54:44,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:44,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225018519] [2021-06-05 04:54:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:44,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:44,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225018519] [2021-06-05 04:54:44,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225018519] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:44,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:44,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885352560] [2021-06-05 04:54:44,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:44,761 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:44,904 INFO L93 Difference]: Finished difference Result 409 states and 1106 transitions. [2021-06-05 04:54:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:44,905 INFO L225 Difference]: With dead ends: 409 [2021-06-05 04:54:44,905 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 04:54:44,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 04:54:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-06-05 04:54:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.910614525139665) internal successors, (521), 179 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-06-05 04:54:44,909 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-06-05 04:54:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:44,909 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-06-05 04:54:44,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-06-05 04:54:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:44,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:44,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:44,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 04:54:44,910 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1848016830, now seen corresponding path program 23 times [2021-06-05 04:54:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:44,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182624927] [2021-06-05 04:54:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:44,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:44,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182624927] [2021-06-05 04:54:44,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182624927] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:44,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:44,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:44,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936173084] [2021-06-05 04:54:44,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:44,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:44,967 INFO L87 Difference]: Start difference. First operand 180 states and 521 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:45,125 INFO L93 Difference]: Finished difference Result 407 states and 1110 transitions. [2021-06-05 04:54:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:45,126 INFO L225 Difference]: With dead ends: 407 [2021-06-05 04:54:45,126 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 04:54:45,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 04:54:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-06-05 04:54:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9395604395604398) internal successors, (535), 182 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-06-05 04:54:45,130 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-06-05 04:54:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:45,130 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-06-05 04:54:45,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-06-05 04:54:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:45,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:45,131 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:45,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-05 04:54:45,131 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash 748230078, now seen corresponding path program 24 times [2021-06-05 04:54:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:45,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583525484] [2021-06-05 04:54:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:45,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583525484] [2021-06-05 04:54:45,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583525484] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:45,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:45,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:45,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570085298] [2021-06-05 04:54:45,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:45,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:45,187 INFO L87 Difference]: Start difference. First operand 183 states and 535 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:45,371 INFO L93 Difference]: Finished difference Result 384 states and 1065 transitions. [2021-06-05 04:54:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:45,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:45,373 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:54:45,373 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:54:45,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:54:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-06-05 04:54:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-05 04:54:45,376 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-05 04:54:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:45,377 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-05 04:54:45,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-05 04:54:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:45,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:45,378 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:45,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-05 04:54:45,378 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1951172510, now seen corresponding path program 25 times [2021-06-05 04:54:45,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:45,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240911373] [2021-06-05 04:54:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:45,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240911373] [2021-06-05 04:54:45,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240911373] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:45,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:45,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:45,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509772419] [2021-06-05 04:54:45,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:45,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:45,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:45,426 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:45,543 INFO L93 Difference]: Finished difference Result 403 states and 1103 transitions. [2021-06-05 04:54:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:45,544 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:54:45,544 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 04:54:45,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:45,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 04:54:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-06-05 04:54:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-06-05 04:54:45,548 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-06-05 04:54:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:45,548 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-06-05 04:54:45,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-06-05 04:54:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:45,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:45,549 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:45,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-05 04:54:45,549 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159426, now seen corresponding path program 26 times [2021-06-05 04:54:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74352262] [2021-06-05 04:54:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:45,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74352262] [2021-06-05 04:54:45,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74352262] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:45,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:45,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857449320] [2021-06-05 04:54:45,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:45,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:45,589 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:45,706 INFO L93 Difference]: Finished difference Result 401 states and 1096 transitions. [2021-06-05 04:54:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:45,710 INFO L225 Difference]: With dead ends: 401 [2021-06-05 04:54:45,710 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 04:54:45,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:45,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 04:54:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-06-05 04:54:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-06-05 04:54:45,714 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-06-05 04:54:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:45,714 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-06-05 04:54:45,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-06-05 04:54:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:45,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:45,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:45,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 04:54:45,714 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash -962111962, now seen corresponding path program 27 times [2021-06-05 04:54:45,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:45,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129835926] [2021-06-05 04:54:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129835926] [2021-06-05 04:54:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129835926] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:45,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:45,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:45,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974358263] [2021-06-05 04:54:45,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:45,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:45,763 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:45,915 INFO L93 Difference]: Finished difference Result 395 states and 1075 transitions. [2021-06-05 04:54:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:45,917 INFO L225 Difference]: With dead ends: 395 [2021-06-05 04:54:45,917 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 04:54:45,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 04:54:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-06-05 04:54:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9444444444444446) internal successors, (530), 180 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-06-05 04:54:45,934 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-06-05 04:54:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:45,934 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-06-05 04:54:45,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-06-05 04:54:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:45,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:45,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:45,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-05 04:54:45,935 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2132300958, now seen corresponding path program 28 times [2021-06-05 04:54:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:45,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271538432] [2021-06-05 04:54:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:45,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:45,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271538432] [2021-06-05 04:54:45,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271538432] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:45,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:45,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:45,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917329234] [2021-06-05 04:54:45,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:45,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:45,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:45,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:45,978 INFO L87 Difference]: Start difference. First operand 181 states and 530 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:46,118 INFO L93 Difference]: Finished difference Result 379 states and 1052 transitions. [2021-06-05 04:54:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:46,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:46,120 INFO L225 Difference]: With dead ends: 379 [2021-06-05 04:54:46,120 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 04:54:46,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:46,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 04:54:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-06-05 04:54:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-06-05 04:54:46,124 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-06-05 04:54:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:46,124 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-06-05 04:54:46,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-06-05 04:54:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:46,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:46,124 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:46,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-05 04:54:46,124 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:46,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2145729286, now seen corresponding path program 29 times [2021-06-05 04:54:46,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:46,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060846185] [2021-06-05 04:54:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:46,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:46,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060846185] [2021-06-05 04:54:46,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060846185] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:46,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:46,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:46,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240248566] [2021-06-05 04:54:46,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:46,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:46,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:46,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:46,167 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:46,292 INFO L93 Difference]: Finished difference Result 363 states and 1003 transitions. [2021-06-05 04:54:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:46,293 INFO L225 Difference]: With dead ends: 363 [2021-06-05 04:54:46,293 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 04:54:46,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 04:54:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-06-05 04:54:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-06-05 04:54:46,297 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-06-05 04:54:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:46,297 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-06-05 04:54:46,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-06-05 04:54:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:46,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:46,297 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:46,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-05 04:54:46,298 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:46,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1008954174, now seen corresponding path program 30 times [2021-06-05 04:54:46,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:46,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866807217] [2021-06-05 04:54:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:46,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:46,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866807217] [2021-06-05 04:54:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866807217] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441439287] [2021-06-05 04:54:46,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:46,341 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:46,466 INFO L93 Difference]: Finished difference Result 342 states and 965 transitions. [2021-06-05 04:54:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:46,467 INFO L225 Difference]: With dead ends: 342 [2021-06-05 04:54:46,467 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:54:46,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:54:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-06-05 04:54:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-06-05 04:54:46,470 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-06-05 04:54:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:46,470 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-06-05 04:54:46,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-06-05 04:54:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:46,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:46,471 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:46,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-05 04:54:46,471 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1057121422, now seen corresponding path program 31 times [2021-06-05 04:54:46,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:46,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983211925] [2021-06-05 04:54:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:46,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983211925] [2021-06-05 04:54:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983211925] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:46,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:46,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:46,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013036755] [2021-06-05 04:54:46,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:46,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:46,529 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:46,701 INFO L93 Difference]: Finished difference Result 377 states and 1036 transitions. [2021-06-05 04:54:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:46,703 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:54:46,703 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 04:54:46,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 04:54:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-06-05 04:54:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9513513513513514) internal successors, (546), 185 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-06-05 04:54:46,706 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-06-05 04:54:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:46,706 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-06-05 04:54:46,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-06-05 04:54:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:46,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:46,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:46,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 04:54:46,707 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:46,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2030292802, now seen corresponding path program 32 times [2021-06-05 04:54:46,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:46,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370049566] [2021-06-05 04:54:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:46,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:46,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370049566] [2021-06-05 04:54:46,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370049566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:46,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:46,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:46,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587803714] [2021-06-05 04:54:46,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:46,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:46,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:46,751 INFO L87 Difference]: Start difference. First operand 186 states and 546 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:46,898 INFO L93 Difference]: Finished difference Result 386 states and 1062 transitions. [2021-06-05 04:54:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:46,899 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:54:46,899 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 04:54:46,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 04:54:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-06-05 04:54:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.978723404255319) internal successors, (560), 188 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-06-05 04:54:46,903 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-06-05 04:54:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:46,903 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-06-05 04:54:46,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-06-05 04:54:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:46,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:46,903 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:46,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-05 04:54:46,903 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash 565954106, now seen corresponding path program 33 times [2021-06-05 04:54:46,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:46,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347433643] [2021-06-05 04:54:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:46,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:46,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347433643] [2021-06-05 04:54:46,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347433643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:46,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:46,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:46,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971751929] [2021-06-05 04:54:46,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:46,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:46,955 INFO L87 Difference]: Start difference. First operand 189 states and 560 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:47,132 INFO L93 Difference]: Finished difference Result 393 states and 1078 transitions. [2021-06-05 04:54:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:47,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:47,133 INFO L225 Difference]: With dead ends: 393 [2021-06-05 04:54:47,133 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:54:47,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:54:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-06-05 04:54:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-06-05 04:54:47,137 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-06-05 04:54:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:47,137 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-06-05 04:54:47,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-06-05 04:54:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:47,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:47,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:47,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-05 04:54:47,138 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:47,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2049664750, now seen corresponding path program 34 times [2021-06-05 04:54:47,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:47,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896327649] [2021-06-05 04:54:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:47,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:47,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896327649] [2021-06-05 04:54:47,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896327649] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:47,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:47,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:47,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728156153] [2021-06-05 04:54:47,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:47,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:47,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:47,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:47,181 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:47,286 INFO L93 Difference]: Finished difference Result 438 states and 1184 transitions. [2021-06-05 04:54:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:47,288 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:54:47,288 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 04:54:47,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 04:54:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-06-05 04:54:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9456521739130435) internal successors, (542), 184 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-06-05 04:54:47,291 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-06-05 04:54:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:47,291 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-06-05 04:54:47,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-06-05 04:54:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:47,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:47,292 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:47,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-05 04:54:47,292 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash 278392308, now seen corresponding path program 35 times [2021-06-05 04:54:47,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:47,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144206565] [2021-06-05 04:54:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:47,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:47,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144206565] [2021-06-05 04:54:47,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144206565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:47,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:47,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:47,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125392961] [2021-06-05 04:54:47,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:47,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:47,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:47,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:47,346 INFO L87 Difference]: Start difference. First operand 185 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:47,466 INFO L93 Difference]: Finished difference Result 433 states and 1175 transitions. [2021-06-05 04:54:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:47,468 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:54:47,468 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:54:47,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:54:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-06-05 04:54:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-06-05 04:54:47,472 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-06-05 04:54:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:47,472 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-06-05 04:54:47,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-06-05 04:54:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:47,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:47,472 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:47,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-05 04:54:47,473 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1347392328, now seen corresponding path program 36 times [2021-06-05 04:54:47,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:47,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116403856] [2021-06-05 04:54:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:47,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116403856] [2021-06-05 04:54:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116403856] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:47,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:47,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342082510] [2021-06-05 04:54:47,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:47,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:47,523 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:47,644 INFO L93 Difference]: Finished difference Result 416 states and 1145 transitions. [2021-06-05 04:54:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:47,645 INFO L225 Difference]: With dead ends: 416 [2021-06-05 04:54:47,645 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 04:54:47,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 04:54:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-06-05 04:54:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-06-05 04:54:47,648 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-06-05 04:54:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:47,649 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-06-05 04:54:47,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-06-05 04:54:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:47,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:47,649 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:47,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-05 04:54:47,649 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1040697164, now seen corresponding path program 37 times [2021-06-05 04:54:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:47,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066587864] [2021-06-05 04:54:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:47,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:47,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066587864] [2021-06-05 04:54:47,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066587864] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:47,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:47,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969781488] [2021-06-05 04:54:47,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:47,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:47,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:47,690 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:47,805 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-06-05 04:54:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:47,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:47,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:47,807 INFO L225 Difference]: With dead ends: 437 [2021-06-05 04:54:47,807 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 04:54:47,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 04:54:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-06-05 04:54:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-06-05 04:54:47,811 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-06-05 04:54:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:47,811 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-06-05 04:54:47,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-06-05 04:54:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:47,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:47,812 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:47,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-05 04:54:47,812 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2035634772, now seen corresponding path program 38 times [2021-06-05 04:54:47,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:47,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609071960] [2021-06-05 04:54:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:47,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:47,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609071960] [2021-06-05 04:54:47,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609071960] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:47,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:47,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:47,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581183376] [2021-06-05 04:54:47,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:47,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:47,863 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:47,974 INFO L93 Difference]: Finished difference Result 435 states and 1194 transitions. [2021-06-05 04:54:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:47,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:47,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:47,976 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:54:47,976 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 04:54:47,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:47,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 04:54:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-06-05 04:54:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-06-05 04:54:47,980 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-06-05 04:54:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:47,980 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-06-05 04:54:47,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-06-05 04:54:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:47,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:47,980 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:47,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-05 04:54:47,980 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash -51636616, now seen corresponding path program 39 times [2021-06-05 04:54:47,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:47,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864601607] [2021-06-05 04:54:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:48,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:48,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864601607] [2021-06-05 04:54:48,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864601607] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:48,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:48,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:48,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401600319] [2021-06-05 04:54:48,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:48,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:48,025 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:48,156 INFO L93 Difference]: Finished difference Result 468 states and 1258 transitions. [2021-06-05 04:54:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:48,157 INFO L225 Difference]: With dead ends: 468 [2021-06-05 04:54:48,157 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 04:54:48,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 04:54:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-06-05 04:54:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9782608695652173) internal successors, (548), 184 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-06-05 04:54:48,161 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-06-05 04:54:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:48,161 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-06-05 04:54:48,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-06-05 04:54:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:48,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:48,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:48,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-05 04:54:48,162 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:48,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1221825612, now seen corresponding path program 40 times [2021-06-05 04:54:48,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:48,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664816880] [2021-06-05 04:54:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:48,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:48,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664816880] [2021-06-05 04:54:48,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664816880] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:48,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:48,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:48,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437734462] [2021-06-05 04:54:48,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:48,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:48,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:48,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:48,211 INFO L87 Difference]: Start difference. First operand 185 states and 548 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:48,355 INFO L93 Difference]: Finished difference Result 452 states and 1235 transitions. [2021-06-05 04:54:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:48,357 INFO L225 Difference]: With dead ends: 452 [2021-06-05 04:54:48,357 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 04:54:48,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 04:54:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-06-05 04:54:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-06-05 04:54:48,360 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-06-05 04:54:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:48,360 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-06-05 04:54:48,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-06-05 04:54:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:48,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:48,361 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:48,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-05 04:54:48,361 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1238762664, now seen corresponding path program 41 times [2021-06-05 04:54:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:48,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663717518] [2021-06-05 04:54:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:48,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:48,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663717518] [2021-06-05 04:54:48,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663717518] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:48,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:48,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:48,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778069803] [2021-06-05 04:54:48,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:48,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:48,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:48,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:48,411 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:48,548 INFO L93 Difference]: Finished difference Result 446 states and 1215 transitions. [2021-06-05 04:54:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:48,549 INFO L225 Difference]: With dead ends: 446 [2021-06-05 04:54:48,549 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 04:54:48,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 04:54:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-06-05 04:54:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-06-05 04:54:48,553 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-06-05 04:54:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:48,553 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-06-05 04:54:48,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-06-05 04:54:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:48,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:48,554 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:48,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-05 04:54:48,554 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash -98478828, now seen corresponding path program 42 times [2021-06-05 04:54:48,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:48,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004885063] [2021-06-05 04:54:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:48,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:48,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004885063] [2021-06-05 04:54:48,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004885063] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:48,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:48,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:48,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308836158] [2021-06-05 04:54:48,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:48,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:48,596 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:48,719 INFO L93 Difference]: Finished difference Result 425 states and 1177 transitions. [2021-06-05 04:54:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:48,720 INFO L225 Difference]: With dead ends: 425 [2021-06-05 04:54:48,721 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 04:54:48,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 04:54:48,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-06-05 04:54:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9101123595505616) internal successors, (518), 178 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-06-05 04:54:48,724 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-06-05 04:54:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:48,724 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-06-05 04:54:48,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-06-05 04:54:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:48,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:48,724 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:48,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-05 04:54:48,725 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash -485249606, now seen corresponding path program 43 times [2021-06-05 04:54:48,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:48,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892957160] [2021-06-05 04:54:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:48,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:48,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892957160] [2021-06-05 04:54:48,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892957160] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:48,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:48,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:48,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25969999] [2021-06-05 04:54:48,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:48,765 INFO L87 Difference]: Start difference. First operand 179 states and 518 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:48,849 INFO L93 Difference]: Finished difference Result 323 states and 889 transitions. [2021-06-05 04:54:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:48,850 INFO L225 Difference]: With dead ends: 323 [2021-06-05 04:54:48,850 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 04:54:48,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 04:54:48,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-06-05 04:54:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-06-05 04:54:48,853 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-06-05 04:54:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:48,853 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-06-05 04:54:48,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-06-05 04:54:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:48,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:48,854 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:48,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-05 04:54:48,854 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:48,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2038445248, now seen corresponding path program 44 times [2021-06-05 04:54:48,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:48,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724039048] [2021-06-05 04:54:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:48,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:48,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724039048] [2021-06-05 04:54:48,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724039048] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:48,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:48,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:48,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693760747] [2021-06-05 04:54:48,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:48,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:48,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:48,894 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,006 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-06-05 04:54:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:49,008 INFO L225 Difference]: With dead ends: 353 [2021-06-05 04:54:49,008 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 04:54:49,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 04:54:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-06-05 04:54:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-06-05 04:54:49,011 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-06-05 04:54:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:49,011 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-06-05 04:54:49,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-06-05 04:54:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:49,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:49,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:49,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-05 04:54:49,012 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash 412660612, now seen corresponding path program 45 times [2021-06-05 04:54:49,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:49,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248778173] [2021-06-05 04:54:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248778173] [2021-06-05 04:54:49,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248778173] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:49,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:49,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:49,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119174680] [2021-06-05 04:54:49,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:49,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:49,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:49,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:49,054 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,165 INFO L93 Difference]: Finished difference Result 336 states and 921 transitions. [2021-06-05 04:54:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:49,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:49,166 INFO L225 Difference]: With dead ends: 336 [2021-06-05 04:54:49,166 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 04:54:49,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:49,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 04:54:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-06-05 04:54:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.901098901098901) internal successors, (528), 182 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-06-05 04:54:49,169 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-06-05 04:54:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:49,169 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-06-05 04:54:49,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-06-05 04:54:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:49,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:49,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:49,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-05 04:54:49,169 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:49,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:49,170 INFO L82 PathProgramCache]: Analyzing trace with hash 379489126, now seen corresponding path program 46 times [2021-06-05 04:54:49,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:49,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496486628] [2021-06-05 04:54:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496486628] [2021-06-05 04:54:49,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496486628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:49,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:49,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:49,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782710713] [2021-06-05 04:54:49,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:49,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:49,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:49,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:49,215 INFO L87 Difference]: Start difference. First operand 183 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,319 INFO L93 Difference]: Finished difference Result 324 states and 889 transitions. [2021-06-05 04:54:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:49,320 INFO L225 Difference]: With dead ends: 324 [2021-06-05 04:54:49,320 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 04:54:49,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 04:54:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-06-05 04:54:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-06-05 04:54:49,340 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-06-05 04:54:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:49,340 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-06-05 04:54:49,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-06-05 04:54:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:49,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:49,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:49,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-05 04:54:49,341 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:49,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1252190110, now seen corresponding path program 47 times [2021-06-05 04:54:49,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:49,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522321805] [2021-06-05 04:54:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522321805] [2021-06-05 04:54:49,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522321805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:49,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:49,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:49,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52542368] [2021-06-05 04:54:49,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:49,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:49,379 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,491 INFO L93 Difference]: Finished difference Result 354 states and 954 transitions. [2021-06-05 04:54:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:49,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:49,492 INFO L225 Difference]: With dead ends: 354 [2021-06-05 04:54:49,492 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 04:54:49,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 04:54:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-06-05 04:54:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.905263157894737) internal successors, (552), 190 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-06-05 04:54:49,495 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-06-05 04:54:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:49,495 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-06-05 04:54:49,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-06-05 04:54:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:49,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:49,496 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:49,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-05 04:54:49,496 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:49,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1416992550, now seen corresponding path program 48 times [2021-06-05 04:54:49,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:49,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435003299] [2021-06-05 04:54:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435003299] [2021-06-05 04:54:49,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435003299] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:49,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:49,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:49,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794019468] [2021-06-05 04:54:49,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:49,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:49,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:49,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:49,538 INFO L87 Difference]: Start difference. First operand 191 states and 552 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,660 INFO L93 Difference]: Finished difference Result 333 states and 916 transitions. [2021-06-05 04:54:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:49,661 INFO L225 Difference]: With dead ends: 333 [2021-06-05 04:54:49,661 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 04:54:49,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 04:54:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-06-05 04:54:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-06-05 04:54:49,664 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-06-05 04:54:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:49,664 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-06-05 04:54:49,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-06-05 04:54:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:49,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:49,665 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:49,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-05 04:54:49,665 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash -167418646, now seen corresponding path program 49 times [2021-06-05 04:54:49,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:49,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3770494] [2021-06-05 04:54:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3770494] [2021-06-05 04:54:49,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3770494] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:49,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:49,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367810784] [2021-06-05 04:54:49,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:49,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:49,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:49,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:49,704 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,836 INFO L93 Difference]: Finished difference Result 386 states and 1068 transitions. [2021-06-05 04:54:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:49,837 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:54:49,837 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 04:54:49,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 04:54:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-06-05 04:54:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.922279792746114) internal successors, (564), 193 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-06-05 04:54:49,840 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-06-05 04:54:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:49,841 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-06-05 04:54:49,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-06-05 04:54:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:49,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:49,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:49,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-05 04:54:49,841 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1386054006, now seen corresponding path program 50 times [2021-06-05 04:54:49,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:49,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822286104] [2021-06-05 04:54:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:49,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822286104] [2021-06-05 04:54:49,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822286104] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:49,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:49,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:49,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565160428] [2021-06-05 04:54:49,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:49,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:49,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:49,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:49,883 INFO L87 Difference]: Start difference. First operand 194 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:49,999 INFO L93 Difference]: Finished difference Result 390 states and 1074 transitions. [2021-06-05 04:54:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:50,000 INFO L225 Difference]: With dead ends: 390 [2021-06-05 04:54:50,000 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 04:54:50,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 04:54:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-06-05 04:54:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-05 04:54:50,004 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-05 04:54:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:50,004 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-05 04:54:50,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-05 04:54:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:50,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:50,004 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:50,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-05 04:54:50,004 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash -310342850, now seen corresponding path program 51 times [2021-06-05 04:54:50,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:50,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126145553] [2021-06-05 04:54:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:50,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:50,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126145553] [2021-06-05 04:54:50,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126145553] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:50,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:50,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:50,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118735824] [2021-06-05 04:54:50,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:50,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:50,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:50,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:50,049 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:50,142 INFO L93 Difference]: Finished difference Result 386 states and 1060 transitions. [2021-06-05 04:54:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:50,143 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:54:50,143 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 04:54:50,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 04:54:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-06-05 04:54:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-05 04:54:50,146 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-05 04:54:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:50,146 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-05 04:54:50,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-05 04:54:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:50,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:50,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:50,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-05 04:54:50,147 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash -548101402, now seen corresponding path program 52 times [2021-06-05 04:54:50,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:50,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474713483] [2021-06-05 04:54:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:50,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:50,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474713483] [2021-06-05 04:54:50,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474713483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:50,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:50,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:50,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316643182] [2021-06-05 04:54:50,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:50,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:50,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:50,186 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:50,322 INFO L93 Difference]: Finished difference Result 464 states and 1256 transitions. [2021-06-05 04:54:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:50,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:50,323 INFO L225 Difference]: With dead ends: 464 [2021-06-05 04:54:50,323 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:54:50,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:54:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-06-05 04:54:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-06-05 04:54:50,326 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-06-05 04:54:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:50,327 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-06-05 04:54:50,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-06-05 04:54:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:50,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:50,327 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:50,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-05 04:54:50,327 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1766736762, now seen corresponding path program 53 times [2021-06-05 04:54:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:50,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798570980] [2021-06-05 04:54:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:50,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:50,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798570980] [2021-06-05 04:54:50,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798570980] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:50,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:50,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:50,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422540338] [2021-06-05 04:54:50,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:50,379 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:50,504 INFO L93 Difference]: Finished difference Result 468 states and 1262 transitions. [2021-06-05 04:54:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:50,505 INFO L225 Difference]: With dead ends: 468 [2021-06-05 04:54:50,505 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 04:54:50,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 04:54:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-06-05 04:54:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-06-05 04:54:50,509 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-06-05 04:54:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:50,509 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-06-05 04:54:50,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-06-05 04:54:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:50,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:50,509 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:50,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-05 04:54:50,509 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:50,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash 440959146, now seen corresponding path program 54 times [2021-06-05 04:54:50,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:50,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774600616] [2021-06-05 04:54:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:50,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:50,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774600616] [2021-06-05 04:54:50,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774600616] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:50,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:50,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:50,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326313008] [2021-06-05 04:54:50,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:50,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:50,560 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:50,708 INFO L93 Difference]: Finished difference Result 431 states and 1182 transitions. [2021-06-05 04:54:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:50,709 INFO L225 Difference]: With dead ends: 431 [2021-06-05 04:54:50,709 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 04:54:50,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 04:54:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-06-05 04:54:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.948717948717949) internal successors, (575), 195 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-06-05 04:54:50,713 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-06-05 04:54:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:50,714 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-06-05 04:54:50,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-06-05 04:54:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:50,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:50,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:50,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-05 04:54:50,714 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash -729229850, now seen corresponding path program 55 times [2021-06-05 04:54:50,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:50,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35454501] [2021-06-05 04:54:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:50,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:50,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35454501] [2021-06-05 04:54:50,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35454501] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:50,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:50,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:50,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016316200] [2021-06-05 04:54:50,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:50,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:50,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:50,755 INFO L87 Difference]: Start difference. First operand 196 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:50,891 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-06-05 04:54:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:50,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:50,892 INFO L225 Difference]: With dead ends: 415 [2021-06-05 04:54:50,893 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 04:54:50,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 04:54:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-06-05 04:54:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-06-05 04:54:50,896 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-06-05 04:54:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:50,896 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-06-05 04:54:50,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-06-05 04:54:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:50,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:50,896 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:50,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-06-05 04:54:50,897 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash -746166902, now seen corresponding path program 56 times [2021-06-05 04:54:50,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:50,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546644682] [2021-06-05 04:54:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:50,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:50,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546644682] [2021-06-05 04:54:50,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546644682] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:50,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:50,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:50,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049335919] [2021-06-05 04:54:50,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:50,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:50,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:50,939 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,058 INFO L93 Difference]: Finished difference Result 449 states and 1229 transitions. [2021-06-05 04:54:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:51,059 INFO L225 Difference]: With dead ends: 449 [2021-06-05 04:54:51,059 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 04:54:51,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 04:54:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-06-05 04:54:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-06-05 04:54:51,063 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-06-05 04:54:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:51,063 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-06-05 04:54:51,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-06-05 04:54:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:51,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:51,064 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:51,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-05 04:54:51,064 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash 394116934, now seen corresponding path program 57 times [2021-06-05 04:54:51,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:51,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081205057] [2021-06-05 04:54:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:51,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081205057] [2021-06-05 04:54:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081205057] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:51,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:51,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:51,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327974553] [2021-06-05 04:54:51,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:51,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:51,109 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,235 INFO L93 Difference]: Finished difference Result 428 states and 1191 transitions. [2021-06-05 04:54:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:51,236 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:54:51,236 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 04:54:51,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 04:54:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-06-05 04:54:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-05 04:54:51,240 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-05 04:54:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:51,240 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-05 04:54:51,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-05 04:54:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:51,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:51,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:51,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-06-05 04:54:51,240 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1262551738, now seen corresponding path program 58 times [2021-06-05 04:54:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:51,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396558029] [2021-06-05 04:54:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:51,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:51,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396558029] [2021-06-05 04:54:51,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396558029] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:51,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:51,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:51,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282648155] [2021-06-05 04:54:51,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:51,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:51,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:51,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:51,290 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,382 INFO L93 Difference]: Finished difference Result 429 states and 1161 transitions. [2021-06-05 04:54:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:51,383 INFO L225 Difference]: With dead ends: 429 [2021-06-05 04:54:51,383 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:54:51,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:54:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-06-05 04:54:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.911917098445596) internal successors, (562), 193 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-06-05 04:54:51,387 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-06-05 04:54:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:51,387 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-06-05 04:54:51,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-06-05 04:54:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:51,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:51,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:51,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-06-05 04:54:51,387 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2074864322, now seen corresponding path program 59 times [2021-06-05 04:54:51,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:51,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817840714] [2021-06-05 04:54:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:51,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:51,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817840714] [2021-06-05 04:54:51,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817840714] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:51,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:51,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:51,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552235386] [2021-06-05 04:54:51,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:51,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:51,429 INFO L87 Difference]: Start difference. First operand 194 states and 562 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,550 INFO L93 Difference]: Finished difference Result 430 states and 1172 transitions. [2021-06-05 04:54:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:51,551 INFO L225 Difference]: With dead ends: 430 [2021-06-05 04:54:51,551 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 04:54:51,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 04:54:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-06-05 04:54:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.928205128205128) internal successors, (571), 195 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-06-05 04:54:51,555 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-06-05 04:54:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:51,555 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-06-05 04:54:51,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-06-05 04:54:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:51,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:51,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:51,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-06-05 04:54:51,556 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:51,556 INFO L82 PathProgramCache]: Analyzing trace with hash -934580486, now seen corresponding path program 60 times [2021-06-05 04:54:51,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:51,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021667140] [2021-06-05 04:54:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:51,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:51,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021667140] [2021-06-05 04:54:51,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021667140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:51,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:51,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:51,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848474240] [2021-06-05 04:54:51,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:51,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:51,599 INFO L87 Difference]: Start difference. First operand 196 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,715 INFO L93 Difference]: Finished difference Result 409 states and 1134 transitions. [2021-06-05 04:54:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:51,716 INFO L225 Difference]: With dead ends: 409 [2021-06-05 04:54:51,716 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 04:54:51,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 04:54:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-06-05 04:54:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-06-05 04:54:51,719 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-06-05 04:54:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:51,719 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-06-05 04:54:51,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-06-05 04:54:51,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:51,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:51,720 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:51,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-06-05 04:54:51,720 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:51,720 INFO L82 PathProgramCache]: Analyzing trace with hash -674451760, now seen corresponding path program 61 times [2021-06-05 04:54:51,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:51,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867502329] [2021-06-05 04:54:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:51,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:51,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867502329] [2021-06-05 04:54:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867502329] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:51,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:51,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565231920] [2021-06-05 04:54:51,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:51,760 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:51,853 INFO L93 Difference]: Finished difference Result 328 states and 903 transitions. [2021-06-05 04:54:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:51,854 INFO L225 Difference]: With dead ends: 328 [2021-06-05 04:54:51,854 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 04:54:51,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 04:54:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-06-05 04:54:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-06-05 04:54:51,858 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-06-05 04:54:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:51,858 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-06-05 04:54:51,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-06-05 04:54:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:51,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:51,858 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:51,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-06-05 04:54:51,858 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1924375180, now seen corresponding path program 62 times [2021-06-05 04:54:51,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:51,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432289615] [2021-06-05 04:54:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:51,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:51,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432289615] [2021-06-05 04:54:51,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432289615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:51,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:51,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:51,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381639060] [2021-06-05 04:54:51,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:51,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:51,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:51,900 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:52,019 INFO L93 Difference]: Finished difference Result 357 states and 963 transitions. [2021-06-05 04:54:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:52,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:52,020 INFO L225 Difference]: With dead ends: 357 [2021-06-05 04:54:52,020 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 04:54:52,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 04:54:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-06-05 04:54:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-06-05 04:54:52,024 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-06-05 04:54:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:52,024 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-06-05 04:54:52,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-06-05 04:54:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:52,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:52,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:52,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-06-05 04:54:52,024 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1151956756, now seen corresponding path program 63 times [2021-06-05 04:54:52,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:52,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088743488] [2021-06-05 04:54:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:52,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088743488] [2021-06-05 04:54:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088743488] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:52,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:52,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:52,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734810559] [2021-06-05 04:54:52,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:52,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:52,076 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:52,194 INFO L93 Difference]: Finished difference Result 334 states and 918 transitions. [2021-06-05 04:54:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:52,195 INFO L225 Difference]: With dead ends: 334 [2021-06-05 04:54:52,195 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 04:54:52,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 04:54:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-06-05 04:54:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-05 04:54:52,198 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-05 04:54:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:52,198 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-05 04:54:52,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-05 04:54:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:52,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:52,199 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:52,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-05 04:54:52,199 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash 263807996, now seen corresponding path program 64 times [2021-06-05 04:54:52,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:52,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735414237] [2021-06-05 04:54:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735414237] [2021-06-05 04:54:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735414237] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:52,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:52,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:52,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395106875] [2021-06-05 04:54:52,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:52,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:52,244 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:52,357 INFO L93 Difference]: Finished difference Result 349 states and 945 transitions. [2021-06-05 04:54:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:52,357 INFO L225 Difference]: With dead ends: 349 [2021-06-05 04:54:52,357 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 04:54:52,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 04:54:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-06-05 04:54:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-06-05 04:54:52,363 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-06-05 04:54:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:52,363 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-06-05 04:54:52,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-06-05 04:54:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:52,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:52,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:52,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-05 04:54:52,363 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:52,364 INFO L82 PathProgramCache]: Analyzing trace with hash -954827364, now seen corresponding path program 65 times [2021-06-05 04:54:52,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:52,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721325417] [2021-06-05 04:54:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:52,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721325417] [2021-06-05 04:54:52,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721325417] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:52,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:52,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:52,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630025090] [2021-06-05 04:54:52,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:52,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:52,414 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:52,549 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-06-05 04:54:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:52,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:52,550 INFO L225 Difference]: With dead ends: 353 [2021-06-05 04:54:52,550 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 04:54:52,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 04:54:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-06-05 04:54:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-06-05 04:54:52,554 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-06-05 04:54:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:52,554 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-06-05 04:54:52,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-06-05 04:54:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:52,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:52,554 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:52,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-05 04:54:52,554 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash 120883792, now seen corresponding path program 66 times [2021-06-05 04:54:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:52,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419541947] [2021-06-05 04:54:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:52,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419541947] [2021-06-05 04:54:52,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419541947] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:52,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:52,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501802215] [2021-06-05 04:54:52,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:52,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:52,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:52,608 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:52,719 INFO L93 Difference]: Finished difference Result 324 states and 891 transitions. [2021-06-05 04:54:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:52,720 INFO L225 Difference]: With dead ends: 324 [2021-06-05 04:54:52,720 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 04:54:52,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:54:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 04:54:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-06-05 04:54:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-05 04:54:52,723 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-05 04:54:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:52,723 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-05 04:54:52,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-05 04:54:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:52,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:52,724 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:52,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-05 04:54:52,724 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:52,724 INFO L82 PathProgramCache]: Analyzing trace with hash 409284692, now seen corresponding path program 67 times [2021-06-05 04:54:52,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:52,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160296120] [2021-06-05 04:54:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:52,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160296120] [2021-06-05 04:54:52,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160296120] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:52,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:52,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:52,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138693479] [2021-06-05 04:54:52,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:52,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:52,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:52,771 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:52,865 INFO L93 Difference]: Finished difference Result 442 states and 1201 transitions. [2021-06-05 04:54:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:52,866 INFO L225 Difference]: With dead ends: 442 [2021-06-05 04:54:52,866 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 04:54:52,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 04:54:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-06-05 04:54:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-06-05 04:54:52,870 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-06-05 04:54:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:52,870 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-06-05 04:54:52,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-06-05 04:54:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:52,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:52,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:52,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-06-05 04:54:52,870 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash -840638728, now seen corresponding path program 68 times [2021-06-05 04:54:52,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:52,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840776121] [2021-06-05 04:54:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:52,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:52,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840776121] [2021-06-05 04:54:52,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840776121] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:52,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:52,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:52,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418688391] [2021-06-05 04:54:52,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:52,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:52,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:52,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:52,909 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:53,036 INFO L93 Difference]: Finished difference Result 465 states and 1248 transitions. [2021-06-05 04:54:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:53,037 INFO L225 Difference]: With dead ends: 465 [2021-06-05 04:54:53,037 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 04:54:53,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 04:54:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-06-05 04:54:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-06-05 04:54:53,041 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-06-05 04:54:53,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:53,041 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-06-05 04:54:53,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-06-05 04:54:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:53,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:53,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:53,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-06-05 04:54:53,041 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2059274088, now seen corresponding path program 69 times [2021-06-05 04:54:53,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:53,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514515487] [2021-06-05 04:54:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:53,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:53,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514515487] [2021-06-05 04:54:53,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514515487] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:53,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:53,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:53,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6284641] [2021-06-05 04:54:53,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:53,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:53,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:53,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:53,086 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:53,210 INFO L93 Difference]: Finished difference Result 442 states and 1203 transitions. [2021-06-05 04:54:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:53,211 INFO L225 Difference]: With dead ends: 442 [2021-06-05 04:54:53,211 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 04:54:53,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 04:54:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-06-05 04:54:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-05 04:54:53,218 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-05 04:54:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:53,218 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-05 04:54:53,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-05 04:54:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:53,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:53,219 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:53,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-06-05 04:54:53,219 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1005390608, now seen corresponding path program 70 times [2021-06-05 04:54:53,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:53,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105215973] [2021-06-05 04:54:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:53,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105215973] [2021-06-05 04:54:53,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105215973] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:53,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:53,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:53,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199657361] [2021-06-05 04:54:53,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:53,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:53,265 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:53,405 INFO L93 Difference]: Finished difference Result 393 states and 1085 transitions. [2021-06-05 04:54:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:53,406 INFO L225 Difference]: With dead ends: 393 [2021-06-05 04:54:53,406 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:54:53,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:54:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-06-05 04:54:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-06-05 04:54:53,409 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-06-05 04:54:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:53,410 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-06-05 04:54:53,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-06-05 04:54:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:53,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:53,410 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:53,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-06-05 04:54:53,410 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 184219092, now seen corresponding path program 71 times [2021-06-05 04:54:53,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:53,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619570650] [2021-06-05 04:54:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:53,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:53,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619570650] [2021-06-05 04:54:53,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619570650] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:53,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:53,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:53,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804819389] [2021-06-05 04:54:53,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:53,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:53,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:53,459 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:53,631 INFO L93 Difference]: Finished difference Result 391 states and 1089 transitions. [2021-06-05 04:54:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:53,632 INFO L225 Difference]: With dead ends: 391 [2021-06-05 04:54:53,632 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:54:53,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:54:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-06-05 04:54:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.955223880597015) internal successors, (594), 201 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-06-05 04:54:53,636 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-06-05 04:54:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:53,636 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-06-05 04:54:53,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-06-05 04:54:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:53,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:53,636 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:53,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-05 04:54:53,636 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1514501296, now seen corresponding path program 72 times [2021-06-05 04:54:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:53,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309554711] [2021-06-05 04:54:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:53,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:53,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309554711] [2021-06-05 04:54:53,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309554711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:53,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:53,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388864307] [2021-06-05 04:54:53,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:53,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:53,681 INFO L87 Difference]: Start difference. First operand 202 states and 594 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:53,828 INFO L93 Difference]: Finished difference Result 368 states and 1044 transitions. [2021-06-05 04:54:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:53,841 INFO L225 Difference]: With dead ends: 368 [2021-06-05 04:54:53,841 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 04:54:53,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 04:54:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-06-05 04:54:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-05 04:54:53,844 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-05 04:54:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-05 04:54:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-05 04:54:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:53,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:53,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:53,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-06-05 04:54:53,845 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash 81063412, now seen corresponding path program 73 times [2021-06-05 04:54:53,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:53,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357216745] [2021-06-05 04:54:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:53,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:53,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357216745] [2021-06-05 04:54:53,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357216745] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:53,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:53,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:53,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610262829] [2021-06-05 04:54:53,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:53,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:53,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:53,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:53,898 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:54,018 INFO L93 Difference]: Finished difference Result 445 states and 1229 transitions. [2021-06-05 04:54:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:54,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:54,019 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:54:54,019 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 04:54:54,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 04:54:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-06-05 04:54:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-05 04:54:54,023 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-05 04:54:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:54,023 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-05 04:54:54,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-05 04:54:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:54,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:54,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:54,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-06-05 04:54:54,024 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1137571948, now seen corresponding path program 74 times [2021-06-05 04:54:54,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:54,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287017888] [2021-06-05 04:54:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:54,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:54,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287017888] [2021-06-05 04:54:54,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287017888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:54,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:54,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:54,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560190261] [2021-06-05 04:54:54,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:54,065 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:54,205 INFO L93 Difference]: Finished difference Result 443 states and 1222 transitions. [2021-06-05 04:54:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:54,206 INFO L225 Difference]: With dead ends: 443 [2021-06-05 04:54:54,206 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:54:54,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:54:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-06-05 04:54:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-05 04:54:54,210 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-05 04:54:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:54,210 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-05 04:54:54,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-05 04:54:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:54,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:54,210 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:54,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-06-05 04:54:54,211 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1070123960, now seen corresponding path program 75 times [2021-06-05 04:54:54,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:54,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645110450] [2021-06-05 04:54:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:54,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:54,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645110450] [2021-06-05 04:54:54,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645110450] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:54,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:54,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:54,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335219621] [2021-06-05 04:54:54,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:54,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:54,256 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:54,402 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-06-05 04:54:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:54,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:54,403 INFO L225 Difference]: With dead ends: 437 [2021-06-05 04:54:54,403 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 04:54:54,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 04:54:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-06-05 04:54:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-06-05 04:54:54,406 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-06-05 04:54:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:54,407 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-06-05 04:54:54,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-06-05 04:54:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:54,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:54,407 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:54,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-06-05 04:54:54,407 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -100065036, now seen corresponding path program 76 times [2021-06-05 04:54:54,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:54,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141777218] [2021-06-05 04:54:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:54,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:54,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141777218] [2021-06-05 04:54:54,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141777218] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:54,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:54,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473509373] [2021-06-05 04:54:54,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:54,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:54,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:54,461 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:54,626 INFO L93 Difference]: Finished difference Result 421 states and 1178 transitions. [2021-06-05 04:54:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:54,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:54,627 INFO L225 Difference]: With dead ends: 421 [2021-06-05 04:54:54,627 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 04:54:54,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 04:54:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-06-05 04:54:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-05 04:54:54,630 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-05 04:54:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:54,631 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-05 04:54:54,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-05 04:54:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:54,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:54,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:54,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-06-05 04:54:54,631 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:54,631 INFO L82 PathProgramCache]: Analyzing trace with hash -117002088, now seen corresponding path program 77 times [2021-06-05 04:54:54,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:54,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494455156] [2021-06-05 04:54:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:54,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:54,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494455156] [2021-06-05 04:54:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494455156] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:54,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:54,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477164958] [2021-06-05 04:54:54,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:54,674 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:54,796 INFO L93 Difference]: Finished difference Result 405 states and 1129 transitions. [2021-06-05 04:54:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:54,797 INFO L225 Difference]: With dead ends: 405 [2021-06-05 04:54:54,797 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:54:54,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:54:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-06-05 04:54:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-05 04:54:54,800 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-05 04:54:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:54,800 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-05 04:54:54,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-05 04:54:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:54,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:54,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:54,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-06-05 04:54:54,801 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:54,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1023281748, now seen corresponding path program 78 times [2021-06-05 04:54:54,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:54,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612297347] [2021-06-05 04:54:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:54,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:54,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612297347] [2021-06-05 04:54:54,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612297347] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:54,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:54,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:54,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971373071] [2021-06-05 04:54:54,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:54,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:54,847 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:54,985 INFO L93 Difference]: Finished difference Result 384 states and 1091 transitions. [2021-06-05 04:54:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:54,986 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:54:54,986 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:54:54,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:54:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-06-05 04:54:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-05 04:54:54,995 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-05 04:54:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:54,995 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-05 04:54:54,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-05 04:54:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:54,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:54,995 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:54,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-06-05 04:54:54,995 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1228196736, now seen corresponding path program 79 times [2021-06-05 04:54:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:54,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209495941] [2021-06-05 04:54:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209495941] [2021-06-05 04:54:55,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209495941] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:55,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:55,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:55,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488340608] [2021-06-05 04:54:55,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:55,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:55,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:55,038 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:55,165 INFO L93 Difference]: Finished difference Result 425 states and 1163 transitions. [2021-06-05 04:54:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:55,166 INFO L225 Difference]: With dead ends: 425 [2021-06-05 04:54:55,166 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 04:54:55,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 04:54:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-06-05 04:54:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-06-05 04:54:55,170 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-06-05 04:54:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:55,170 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-06-05 04:54:55,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-06-05 04:54:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:55,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:55,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:55,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-06-05 04:54:55,171 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1848135200, now seen corresponding path program 80 times [2021-06-05 04:54:55,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:55,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560262435] [2021-06-05 04:54:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560262435] [2021-06-05 04:54:55,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560262435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:55,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:55,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:55,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238069899] [2021-06-05 04:54:55,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:55,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:55,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:55,216 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:55,358 INFO L93 Difference]: Finished difference Result 429 states and 1169 transitions. [2021-06-05 04:54:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:55,359 INFO L225 Difference]: With dead ends: 429 [2021-06-05 04:54:55,359 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:54:55,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:54:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-06-05 04:54:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-06-05 04:54:55,362 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-06-05 04:54:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:55,362 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-06-05 04:54:55,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-06-05 04:54:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:55,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:55,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:55,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-06-05 04:54:55,363 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:55,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1371120940, now seen corresponding path program 81 times [2021-06-05 04:54:55,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:55,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336227831] [2021-06-05 04:54:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336227831] [2021-06-05 04:54:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336227831] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:55,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:55,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011728533] [2021-06-05 04:54:55,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:55,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:55,414 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:55,520 INFO L93 Difference]: Finished difference Result 429 states and 1163 transitions. [2021-06-05 04:54:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:55,521 INFO L225 Difference]: With dead ends: 429 [2021-06-05 04:54:55,521 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:54:55,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:54:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-06-05 04:54:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-05 04:54:55,524 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-05 04:54:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:55,524 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-05 04:54:55,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-05 04:54:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:55,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:55,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:55,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-06-05 04:54:55,525 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:55,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1608879492, now seen corresponding path program 82 times [2021-06-05 04:54:55,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:55,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265577424] [2021-06-05 04:54:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265577424] [2021-06-05 04:54:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265577424] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:55,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:55,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:55,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362134696] [2021-06-05 04:54:55,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:55,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:55,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:55,561 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:55,677 INFO L93 Difference]: Finished difference Result 451 states and 1224 transitions. [2021-06-05 04:54:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:55,678 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:54:55,678 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 04:54:55,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 04:54:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-06-05 04:54:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-05 04:54:55,681 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-05 04:54:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:55,681 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-05 04:54:55,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-05 04:54:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:55,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:55,682 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:55,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-06-05 04:54:55,682 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1467452444, now seen corresponding path program 83 times [2021-06-05 04:54:55,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:55,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075498736] [2021-06-05 04:54:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075498736] [2021-06-05 04:54:55,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075498736] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:55,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:55,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:55,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408262242] [2021-06-05 04:54:55,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:55,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:55,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:55,729 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:55,860 INFO L93 Difference]: Finished difference Result 455 states and 1230 transitions. [2021-06-05 04:54:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:55,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:55,861 INFO L225 Difference]: With dead ends: 455 [2021-06-05 04:54:55,861 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 04:54:55,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 04:54:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-06-05 04:54:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-05 04:54:55,864 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-05 04:54:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:55,864 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-05 04:54:55,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-05 04:54:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:55,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:55,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:55,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-05 04:54:55,865 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash -619818944, now seen corresponding path program 84 times [2021-06-05 04:54:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504027942] [2021-06-05 04:54:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:55,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504027942] [2021-06-05 04:54:55,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504027942] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:55,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:55,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:55,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293746173] [2021-06-05 04:54:55,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:55,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:55,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:55,914 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:56,053 INFO L93 Difference]: Finished difference Result 422 states and 1158 transitions. [2021-06-05 04:54:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:56,054 INFO L225 Difference]: With dead ends: 422 [2021-06-05 04:54:56,054 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:54:56,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:54:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-06-05 04:54:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-06-05 04:54:56,057 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-06-05 04:54:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:56,057 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-06-05 04:54:56,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-06-05 04:54:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:56,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:56,058 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:56,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-05 04:54:56,058 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1790007940, now seen corresponding path program 85 times [2021-06-05 04:54:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:56,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975982160] [2021-06-05 04:54:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:56,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:56,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975982160] [2021-06-05 04:54:56,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975982160] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:56,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:56,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:56,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493353306] [2021-06-05 04:54:56,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:56,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:56,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:56,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:56,111 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:56,264 INFO L93 Difference]: Finished difference Result 406 states and 1135 transitions. [2021-06-05 04:54:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:56,264 INFO L225 Difference]: With dead ends: 406 [2021-06-05 04:54:56,265 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:54:56,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:54:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-06-05 04:54:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-06-05 04:54:56,268 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-06-05 04:54:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:56,268 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-06-05 04:54:56,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-06-05 04:54:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:56,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:56,269 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:56,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-05 04:54:56,269 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1806944992, now seen corresponding path program 86 times [2021-06-05 04:54:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:56,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428911165] [2021-06-05 04:54:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:56,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:56,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428911165] [2021-06-05 04:54:56,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428911165] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:56,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:56,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204536286] [2021-06-05 04:54:56,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:56,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:56,316 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:56,441 INFO L93 Difference]: Finished difference Result 440 states and 1205 transitions. [2021-06-05 04:54:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:56,442 INFO L225 Difference]: With dead ends: 440 [2021-06-05 04:54:56,442 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 04:54:56,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 04:54:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-06-05 04:54:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-06-05 04:54:56,445 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-06-05 04:54:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:56,446 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-06-05 04:54:56,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-06-05 04:54:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:56,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:56,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:56,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-06-05 04:54:56,446 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash -666661156, now seen corresponding path program 87 times [2021-06-05 04:54:56,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:56,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448362577] [2021-06-05 04:54:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:56,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:56,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448362577] [2021-06-05 04:54:56,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448362577] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:56,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:56,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823997630] [2021-06-05 04:54:56,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:56,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:56,484 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:56,615 INFO L93 Difference]: Finished difference Result 419 states and 1167 transitions. [2021-06-05 04:54:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:56,616 INFO L225 Difference]: With dead ends: 419 [2021-06-05 04:54:56,616 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 04:54:56,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 04:54:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-06-05 04:54:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-06-05 04:54:56,619 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-06-05 04:54:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:56,619 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-06-05 04:54:56,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-06-05 04:54:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:56,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:56,619 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:56,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-06-05 04:54:56,619 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash 201773648, now seen corresponding path program 88 times [2021-06-05 04:54:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:56,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72433203] [2021-06-05 04:54:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:56,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:56,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72433203] [2021-06-05 04:54:56,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72433203] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:56,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:56,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:56,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823348362] [2021-06-05 04:54:56,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:56,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:56,676 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:56,776 INFO L93 Difference]: Finished difference Result 382 states and 1052 transitions. [2021-06-05 04:54:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:56,776 INFO L225 Difference]: With dead ends: 382 [2021-06-05 04:54:56,777 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:54:56,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:54:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-06-05 04:54:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-06-05 04:54:56,780 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-06-05 04:54:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:56,780 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-06-05 04:54:56,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-06-05 04:54:56,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:56,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:56,780 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:56,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-06-05 04:54:56,780 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:56,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1159324884, now seen corresponding path program 89 times [2021-06-05 04:54:56,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:56,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715951072] [2021-06-05 04:54:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:56,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:56,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715951072] [2021-06-05 04:54:56,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715951072] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:56,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:56,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:56,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312971135] [2021-06-05 04:54:56,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:56,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:56,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:56,826 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:56,960 INFO L93 Difference]: Finished difference Result 383 states and 1063 transitions. [2021-06-05 04:54:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:56,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:56,961 INFO L225 Difference]: With dead ends: 383 [2021-06-05 04:54:56,961 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 04:54:56,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 04:54:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-06-05 04:54:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-06-05 04:54:56,964 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-06-05 04:54:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:56,965 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-06-05 04:54:56,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-06-05 04:54:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:54:56,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:56,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:56,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-06-05 04:54:56,965 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1995358576, now seen corresponding path program 90 times [2021-06-05 04:54:56,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:56,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079072923] [2021-06-05 04:54:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:57,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079072923] [2021-06-05 04:54:57,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079072923] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:54:57,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:54:57,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:54:57,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358247886] [2021-06-05 04:54:57,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:54:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:54:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:54:57,019 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:57,147 INFO L93 Difference]: Finished difference Result 362 states and 1025 transitions. [2021-06-05 04:54:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:57,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:54:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:57,148 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:54:57,148 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:54:57,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:54:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:54:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-06-05 04:54:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-06-05 04:54:57,151 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-06-05 04:54:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:57,151 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-06-05 04:54:57,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-06-05 04:54:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:54:57,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:57,152 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:57,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-06-05 04:54:57,152 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:57,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1303103675, now seen corresponding path program 1 times [2021-06-05 04:54:57,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:57,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336952728] [2021-06-05 04:54:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:57,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336952728] [2021-06-05 04:54:57,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336952728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:57,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140363017] [2021-06-05 04:54:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:54:57,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140363017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:57,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:57,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:54:57,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372856333] [2021-06-05 04:54:57,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:54:57,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:54:57,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:57,397 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:57,538 INFO L93 Difference]: Finished difference Result 363 states and 1031 transitions. [2021-06-05 04:54:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:54:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:57,548 INFO L225 Difference]: With dead ends: 363 [2021-06-05 04:54:57,548 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 04:54:57,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:54:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 04:54:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-06-05 04:54:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-06-05 04:54:57,554 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 18 [2021-06-05 04:54:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:57,554 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-06-05 04:54:57,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-06-05 04:54:57,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:54:57,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:57,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:57,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 04:54:57,769 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash -95550603, now seen corresponding path program 2 times [2021-06-05 04:54:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:57,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775788324] [2021-06-05 04:54:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:57,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775788324] [2021-06-05 04:54:57,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775788324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:57,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370810767] [2021-06-05 04:54:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:57,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:54:57,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:57,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370810767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:57,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:57,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:54:57,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134021593] [2021-06-05 04:54:57,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:54:57,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:57,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:54:57,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:54:57,949 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:58,071 INFO L93 Difference]: Finished difference Result 405 states and 1139 transitions. [2021-06-05 04:54:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:54:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:58,072 INFO L225 Difference]: With dead ends: 405 [2021-06-05 04:54:58,072 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 04:54:58,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:54:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 04:54:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 214. [2021-06-05 04:54:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.004694835680751) internal successors, (640), 213 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 640 transitions. [2021-06-05 04:54:58,088 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 640 transitions. Word has length 18 [2021-06-05 04:54:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:58,088 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 640 transitions. [2021-06-05 04:54:58,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 640 transitions. [2021-06-05 04:54:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:54:58,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:58,088 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:58,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:58,289 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1794270991, now seen corresponding path program 3 times [2021-06-05 04:54:58,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:58,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114798305] [2021-06-05 04:54:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:58,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114798305] [2021-06-05 04:54:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114798305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361033938] [2021-06-05 04:54:58,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:58,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:54:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:54:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:58,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361033938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:58,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:58,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:54:58,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519860330] [2021-06-05 04:54:58,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:54:58,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:54:58,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:58,441 INFO L87 Difference]: Start difference. First operand 214 states and 640 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:58,593 INFO L93 Difference]: Finished difference Result 384 states and 1093 transitions. [2021-06-05 04:54:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:54:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:58,594 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:54:58,594 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 04:54:58,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:54:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 04:54:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 206. [2021-06-05 04:54:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9658536585365853) internal successors, (608), 205 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 608 transitions. [2021-06-05 04:54:58,599 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 608 transitions. Word has length 18 [2021-06-05 04:54:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:58,599 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 608 transitions. [2021-06-05 04:54:58,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 608 transitions. [2021-06-05 04:54:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:54:58,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:58,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:58,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 04:54:58,819 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash -605004921, now seen corresponding path program 4 times [2021-06-05 04:54:58,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:58,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088002937] [2021-06-05 04:54:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:58,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088002937] [2021-06-05 04:54:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088002937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389260941] [2021-06-05 04:54:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:58,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:58,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:54:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:59,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389260941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:59,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:59,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:54:59,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339800248] [2021-06-05 04:54:59,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:54:59,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:59,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:54:59,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:59,006 INFO L87 Difference]: Start difference. First operand 206 states and 608 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:59,148 INFO L93 Difference]: Finished difference Result 395 states and 1126 transitions. [2021-06-05 04:54:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:59,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:54:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:59,149 INFO L225 Difference]: With dead ends: 395 [2021-06-05 04:54:59,149 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:54:59,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:54:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:54:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 212. [2021-06-05 04:54:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.990521327014218) internal successors, (631), 211 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-06-05 04:54:59,152 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 18 [2021-06-05 04:54:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:59,152 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-06-05 04:54:59,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-06-05 04:54:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:54:59,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:59,154 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:59,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 04:54:59,371 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:59,371 INFO L82 PathProgramCache]: Analyzing trace with hash -630780405, now seen corresponding path program 5 times [2021-06-05 04:54:59,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:59,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564874830] [2021-06-05 04:54:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:59,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564874830] [2021-06-05 04:54:59,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564874830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:59,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651136601] [2021-06-05 04:54:59,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:59,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:54:59,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:54:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:59,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651136601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:59,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:54:59,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:54:59,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110447742] [2021-06-05 04:54:59,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:54:59,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:54:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:54:59,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:54:59,517 INFO L87 Difference]: Start difference. First operand 212 states and 631 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:59,658 INFO L93 Difference]: Finished difference Result 437 states and 1235 transitions. [2021-06-05 04:54:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:54:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:54:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:59,659 INFO L225 Difference]: With dead ends: 437 [2021-06-05 04:54:59,659 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:54:59,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:54:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:54:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 216. [2021-06-05 04:54:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.027906976744186) internal successors, (651), 215 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 651 transitions. [2021-06-05 04:54:59,662 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 651 transitions. Word has length 18 [2021-06-05 04:54:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:59,662 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 651 transitions. [2021-06-05 04:54:59,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:54:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 651 transitions. [2021-06-05 04:54:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:54:59,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:59,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:54:59,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 04:54:59,879 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1965466503, now seen corresponding path program 6 times [2021-06-05 04:54:59,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:59,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661309786] [2021-06-05 04:54:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:54:59,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:59,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661309786] [2021-06-05 04:54:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661309786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:59,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203232653] [2021-06-05 04:54:59,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:59,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:54:59,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:54:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:00,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203232653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:00,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:00,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:00,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862767269] [2021-06-05 04:55:00,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:00,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:00,006 INFO L87 Difference]: Start difference. First operand 216 states and 651 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:00,129 INFO L93 Difference]: Finished difference Result 408 states and 1169 transitions. [2021-06-05 04:55:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:00,130 INFO L225 Difference]: With dead ends: 408 [2021-06-05 04:55:00,130 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 04:55:00,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 04:55:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 202. [2021-06-05 04:55:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 3.0049751243781095) internal successors, (604), 201 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 604 transitions. [2021-06-05 04:55:00,133 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 604 transitions. Word has length 18 [2021-06-05 04:55:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:00,133 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 604 transitions. [2021-06-05 04:55:00,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 604 transitions. [2021-06-05 04:55:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:00,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:00,134 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:00,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:00,352 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash -725187835, now seen corresponding path program 1 times [2021-06-05 04:55:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:00,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467491113] [2021-06-05 04:55:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:00,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:00,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467491113] [2021-06-05 04:55:00,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467491113] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:00,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:00,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:55:00,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210623993] [2021-06-05 04:55:00,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:55:00,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:55:00,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:55:00,394 INFO L87 Difference]: Start difference. First operand 202 states and 604 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:00,468 INFO L93 Difference]: Finished difference Result 424 states and 1195 transitions. [2021-06-05 04:55:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:00,469 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:55:00,469 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:55:00,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:55:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 252. [2021-06-05 04:55:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9322709163346614) internal successors, (736), 251 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 736 transitions. [2021-06-05 04:55:00,473 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 736 transitions. Word has length 18 [2021-06-05 04:55:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:00,473 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 736 transitions. [2021-06-05 04:55:00,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 736 transitions. [2021-06-05 04:55:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:00,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:00,473 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:00,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-06-05 04:55:00,473 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash -809235458, now seen corresponding path program 1 times [2021-06-05 04:55:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:00,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822533578] [2021-06-05 04:55:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:00,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:00,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822533578] [2021-06-05 04:55:00,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822533578] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:00,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:00,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:55:00,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179360505] [2021-06-05 04:55:00,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:55:00,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:55:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:55:00,524 INFO L87 Difference]: Start difference. First operand 252 states and 736 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:00,592 INFO L93 Difference]: Finished difference Result 445 states and 1245 transitions. [2021-06-05 04:55:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:00,593 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:55:00,593 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 04:55:00,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 04:55:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 269. [2021-06-05 04:55:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.921641791044776) internal successors, (783), 268 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 783 transitions. [2021-06-05 04:55:00,596 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 783 transitions. Word has length 18 [2021-06-05 04:55:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:00,596 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 783 transitions. [2021-06-05 04:55:00,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 783 transitions. [2021-06-05 04:55:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:00,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:00,597 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:00,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-06-05 04:55:00,597 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:00,597 INFO L82 PathProgramCache]: Analyzing trace with hash -966424801, now seen corresponding path program 7 times [2021-06-05 04:55:00,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:00,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572413264] [2021-06-05 04:55:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:00,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572413264] [2021-06-05 04:55:00,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572413264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905558743] [2021-06-05 04:55:00,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:00,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:00,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:00,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905558743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:00,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:00,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:00,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351684124] [2021-06-05 04:55:00,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:00,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:00,752 INFO L87 Difference]: Start difference. First operand 269 states and 783 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:00,901 INFO L93 Difference]: Finished difference Result 563 states and 1578 transitions. [2021-06-05 04:55:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:00,902 INFO L225 Difference]: With dead ends: 563 [2021-06-05 04:55:00,902 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:55:00,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:55:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 278. [2021-06-05 04:55:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.963898916967509) internal successors, (821), 277 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 821 transitions. [2021-06-05 04:55:00,906 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 821 transitions. Word has length 18 [2021-06-05 04:55:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:00,906 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 821 transitions. [2021-06-05 04:55:00,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 821 transitions. [2021-06-05 04:55:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:00,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:00,907 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:01,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 04:55:01,121 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash 241128271, now seen corresponding path program 8 times [2021-06-05 04:55:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:01,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469361900] [2021-06-05 04:55:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:01,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469361900] [2021-06-05 04:55:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469361900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114077628] [2021-06-05 04:55:01,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:01,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:01,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:01,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114077628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:01,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:01,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:01,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444464752] [2021-06-05 04:55:01,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:01,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:01,257 INFO L87 Difference]: Start difference. First operand 278 states and 821 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:01,382 INFO L93 Difference]: Finished difference Result 539 states and 1539 transitions. [2021-06-05 04:55:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:01,383 INFO L225 Difference]: With dead ends: 539 [2021-06-05 04:55:01,383 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:55:01,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:55:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 282. [2021-06-05 04:55:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.99288256227758) internal successors, (841), 281 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 841 transitions. [2021-06-05 04:55:01,387 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 841 transitions. Word has length 18 [2021-06-05 04:55:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:01,388 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 841 transitions. [2021-06-05 04:55:01,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 841 transitions. [2021-06-05 04:55:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:01,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:01,388 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:01,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 04:55:01,601 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1457592117, now seen corresponding path program 9 times [2021-06-05 04:55:01,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:01,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459839384] [2021-06-05 04:55:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:01,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:01,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459839384] [2021-06-05 04:55:01,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459839384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:01,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22071661] [2021-06-05 04:55:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:01,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:01,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:01,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:01,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22071661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:01,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:01,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:01,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817302783] [2021-06-05 04:55:01,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:01,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:01,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:01,835 INFO L87 Difference]: Start difference. First operand 282 states and 841 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:01,972 INFO L93 Difference]: Finished difference Result 549 states and 1564 transitions. [2021-06-05 04:55:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:01,973 INFO L225 Difference]: With dead ends: 549 [2021-06-05 04:55:01,973 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 04:55:01,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 04:55:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 271. [2021-06-05 04:55:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.937037037037037) internal successors, (793), 270 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 793 transitions. [2021-06-05 04:55:01,977 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 793 transitions. Word has length 18 [2021-06-05 04:55:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:01,977 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 793 transitions. [2021-06-05 04:55:01,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 793 transitions. [2021-06-05 04:55:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:01,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:01,978 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:02,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:02,186 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:02,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1254344866, now seen corresponding path program 2 times [2021-06-05 04:55:02,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:02,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733759933] [2021-06-05 04:55:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:02,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:02,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733759933] [2021-06-05 04:55:02,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733759933] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:02,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:02,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:55:02,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954580993] [2021-06-05 04:55:02,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:55:02,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:55:02,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:55:02,233 INFO L87 Difference]: Start difference. First operand 271 states and 793 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:02,303 INFO L93 Difference]: Finished difference Result 528 states and 1474 transitions. [2021-06-05 04:55:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:02,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:02,304 INFO L225 Difference]: With dead ends: 528 [2021-06-05 04:55:02,304 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:55:02,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:55:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-06-05 04:55:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.972027972027972) internal successors, (850), 286 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 850 transitions. [2021-06-05 04:55:02,309 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 850 transitions. Word has length 18 [2021-06-05 04:55:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:02,309 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 850 transitions. [2021-06-05 04:55:02,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 850 transitions. [2021-06-05 04:55:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:02,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:02,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:02,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-06-05 04:55:02,309 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1663824377, now seen corresponding path program 10 times [2021-06-05 04:55:02,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:02,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47952078] [2021-06-05 04:55:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:02,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47952078] [2021-06-05 04:55:02,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47952078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577001522] [2021-06-05 04:55:02,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:02,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:02,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:02,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:02,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:02,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577001522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:02,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:02,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:02,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102390770] [2021-06-05 04:55:02,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:02,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:02,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:02,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:02,487 INFO L87 Difference]: Start difference. First operand 287 states and 850 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:02,687 INFO L93 Difference]: Finished difference Result 473 states and 1329 transitions. [2021-06-05 04:55:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:02,688 INFO L225 Difference]: With dead ends: 473 [2021-06-05 04:55:02,689 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 04:55:02,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 04:55:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 291. [2021-06-05 04:55:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9655172413793105) internal successors, (860), 290 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-06-05 04:55:02,692 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 18 [2021-06-05 04:55:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:02,692 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-06-05 04:55:02,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-06-05 04:55:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:02,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:02,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:02,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 04:55:02,896 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1866597709, now seen corresponding path program 11 times [2021-06-05 04:55:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:02,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747734665] [2021-06-05 04:55:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:02,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:02,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747734665] [2021-06-05 04:55:02,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747734665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:02,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808873832] [2021-06-05 04:55:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:02,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:02,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:03,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808873832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:03,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:03,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:03,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007578193] [2021-06-05 04:55:03,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:03,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:03,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:03,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:03,082 INFO L87 Difference]: Start difference. First operand 291 states and 860 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:03,306 INFO L93 Difference]: Finished difference Result 431 states and 1219 transitions. [2021-06-05 04:55:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:03,307 INFO L225 Difference]: With dead ends: 431 [2021-06-05 04:55:03,307 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 04:55:03,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 04:55:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 299. [2021-06-05 04:55:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.966442953020134) internal successors, (884), 298 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 884 transitions. [2021-06-05 04:55:03,311 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 884 transitions. Word has length 18 [2021-06-05 04:55:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:03,311 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 884 transitions. [2021-06-05 04:55:03,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 884 transitions. [2021-06-05 04:55:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:03,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:03,312 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:03,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 04:55:03,528 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash -752125083, now seen corresponding path program 2 times [2021-06-05 04:55:03,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:03,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152755240] [2021-06-05 04:55:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:03,697 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 04:55:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:03,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:03,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152755240] [2021-06-05 04:55:03,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152755240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:03,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671712416] [2021-06-05 04:55:03,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:03,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:03,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:03,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:55:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:03,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671712416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:03,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:03,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:03,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386775671] [2021-06-05 04:55:03,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:03,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:03,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:03,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:03,855 INFO L87 Difference]: Start difference. First operand 299 states and 884 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:03,959 INFO L93 Difference]: Finished difference Result 471 states and 1313 transitions. [2021-06-05 04:55:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:03,960 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:55:03,960 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:55:03,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:55:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 301. [2021-06-05 04:55:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.97) internal successors, (891), 300 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 891 transitions. [2021-06-05 04:55:03,964 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 891 transitions. Word has length 18 [2021-06-05 04:55:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:03,964 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 891 transitions. [2021-06-05 04:55:03,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 891 transitions. [2021-06-05 04:55:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:03,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:03,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:04,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:04,181 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1213009967, now seen corresponding path program 12 times [2021-06-05 04:55:04,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:04,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843117836] [2021-06-05 04:55:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:04,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:04,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843117836] [2021-06-05 04:55:04,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843117836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:04,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134813778] [2021-06-05 04:55:04,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:04,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:04,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134813778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:04,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:04,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:04,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672535842] [2021-06-05 04:55:04,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:04,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:04,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:04,464 INFO L87 Difference]: Start difference. First operand 301 states and 891 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:04,701 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-06-05 04:55:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:04,705 INFO L225 Difference]: With dead ends: 417 [2021-06-05 04:55:04,705 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 04:55:04,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 04:55:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 295. [2021-06-05 04:55:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 04:55:04,709 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-06-05 04:55:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:04,709 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 04:55:04,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 04:55:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:04,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:04,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:04,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 04:55:04,926 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash 303490843, now seen corresponding path program 3 times [2021-06-05 04:55:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:04,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801756631] [2021-06-05 04:55:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:04,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:04,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801756631] [2021-06-05 04:55:04,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801756631] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:04,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:04,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:55:04,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495128394] [2021-06-05 04:55:04,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:55:04,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:04,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:55:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:55:04,982 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:05,139 INFO L93 Difference]: Finished difference Result 441 states and 1242 transitions. [2021-06-05 04:55:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:05,140 INFO L225 Difference]: With dead ends: 441 [2021-06-05 04:55:05,140 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 04:55:05,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 04:55:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 295. [2021-06-05 04:55:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9659863945578233) internal successors, (872), 294 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-06-05 04:55:05,148 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-06-05 04:55:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:05,148 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-06-05 04:55:05,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-06-05 04:55:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:05,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:05,148 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:05,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-06-05 04:55:05,148 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:05,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:05,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1861527460, now seen corresponding path program 3 times [2021-06-05 04:55:05,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:05,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300906377] [2021-06-05 04:55:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:05,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:05,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300906377] [2021-06-05 04:55:05,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300906377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:05,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885609038] [2021-06-05 04:55:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:05,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:05,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:05,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:05,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885609038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:05,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:05,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 04:55:05,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55810552] [2021-06-05 04:55:05,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:05,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:05,408 INFO L87 Difference]: Start difference. First operand 295 states and 872 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:05,517 INFO L93 Difference]: Finished difference Result 458 states and 1290 transitions. [2021-06-05 04:55:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:05,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:05,518 INFO L225 Difference]: With dead ends: 458 [2021-06-05 04:55:05,518 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 04:55:05,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 04:55:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 292. [2021-06-05 04:55:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9690721649484537) internal successors, (864), 291 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 864 transitions. [2021-06-05 04:55:05,522 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 864 transitions. Word has length 18 [2021-06-05 04:55:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:05,522 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 864 transitions. [2021-06-05 04:55:05,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 864 transitions. [2021-06-05 04:55:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:05,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:05,522 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:05,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:05,739 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1997185865, now seen corresponding path program 13 times [2021-06-05 04:55:05,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:05,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588896394] [2021-06-05 04:55:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:05,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:05,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588896394] [2021-06-05 04:55:05,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588896394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:05,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296457561] [2021-06-05 04:55:05,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:06,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296457561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:06,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:06,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 04:55:06,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88399231] [2021-06-05 04:55:06,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:06,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:06,041 INFO L87 Difference]: Start difference. First operand 292 states and 864 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:06,222 INFO L93 Difference]: Finished difference Result 491 states and 1393 transitions. [2021-06-05 04:55:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:06,223 INFO L225 Difference]: With dead ends: 491 [2021-06-05 04:55:06,223 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:55:06,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:55:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 298. [2021-06-05 04:55:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0033670033670035) internal successors, (892), 297 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 892 transitions. [2021-06-05 04:55:06,227 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 892 transitions. Word has length 18 [2021-06-05 04:55:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:06,227 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 892 transitions. [2021-06-05 04:55:06,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 892 transitions. [2021-06-05 04:55:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:06,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:06,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:06,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:06,428 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1067024689, now seen corresponding path program 14 times [2021-06-05 04:55:06,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:06,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931822728] [2021-06-05 04:55:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:06,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:06,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931822728] [2021-06-05 04:55:06,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931822728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:06,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507979304] [2021-06-05 04:55:06,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:06,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:06,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507979304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:06,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:06,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:06,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847674966] [2021-06-05 04:55:06,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:06,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:06,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:06,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:06,611 INFO L87 Difference]: Start difference. First operand 298 states and 892 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:06,780 INFO L93 Difference]: Finished difference Result 479 states and 1353 transitions. [2021-06-05 04:55:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:06,781 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:55:06,781 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:55:06,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:55:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-06-05 04:55:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9833887043189367) internal successors, (898), 301 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 898 transitions. [2021-06-05 04:55:06,785 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 898 transitions. Word has length 18 [2021-06-05 04:55:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:06,785 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 898 transitions. [2021-06-05 04:55:06,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 898 transitions. [2021-06-05 04:55:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:06,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:06,786 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:07,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 04:55:07,001 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash -435848983, now seen corresponding path program 4 times [2021-06-05 04:55:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:07,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410691201] [2021-06-05 04:55:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:07,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:07,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410691201] [2021-06-05 04:55:07,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410691201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:07,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519810393] [2021-06-05 04:55:07,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:07,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:07,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:07,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:07,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519810393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:07,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:07,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 04:55:07,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283325309] [2021-06-05 04:55:07,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:07,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:07,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:07,125 INFO L87 Difference]: Start difference. First operand 302 states and 898 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:07,174 INFO L93 Difference]: Finished difference Result 566 states and 1645 transitions. [2021-06-05 04:55:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:07,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:07,177 INFO L225 Difference]: With dead ends: 566 [2021-06-05 04:55:07,177 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 04:55:07,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 04:55:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-06-05 04:55:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.041935483870968) internal successors, (943), 310 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 943 transitions. [2021-06-05 04:55:07,182 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 943 transitions. Word has length 18 [2021-06-05 04:55:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:07,182 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 943 transitions. [2021-06-05 04:55:07,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 943 transitions. [2021-06-05 04:55:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:07,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:07,182 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:07,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:07,392 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1726676173, now seen corresponding path program 15 times [2021-06-05 04:55:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:07,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752094429] [2021-06-05 04:55:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:07,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:07,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752094429] [2021-06-05 04:55:07,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752094429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:07,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853372626] [2021-06-05 04:55:07,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:07,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:07,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:07,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:07,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853372626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:07,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:07,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:07,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239422220] [2021-06-05 04:55:07,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:07,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:07,620 INFO L87 Difference]: Start difference. First operand 311 states and 943 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:07,844 INFO L93 Difference]: Finished difference Result 516 states and 1480 transitions. [2021-06-05 04:55:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:07,846 INFO L225 Difference]: With dead ends: 516 [2021-06-05 04:55:07,846 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 04:55:07,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 04:55:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 308. [2021-06-05 04:55:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0618892508143323) internal successors, (940), 307 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 940 transitions. [2021-06-05 04:55:07,850 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 940 transitions. Word has length 18 [2021-06-05 04:55:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:07,851 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 940 transitions. [2021-06-05 04:55:07,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 940 transitions. [2021-06-05 04:55:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:07,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:07,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:08,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 04:55:08,060 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:08,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1907804621, now seen corresponding path program 16 times [2021-06-05 04:55:08,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:08,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884191385] [2021-06-05 04:55:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:08,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:08,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884191385] [2021-06-05 04:55:08,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884191385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:08,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186176893] [2021-06-05 04:55:08,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:08,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:08,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:08,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186176893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:08,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:08,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:08,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464270842] [2021-06-05 04:55:08,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:08,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:08,219 INFO L87 Difference]: Start difference. First operand 308 states and 940 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:08,327 INFO L93 Difference]: Finished difference Result 497 states and 1451 transitions. [2021-06-05 04:55:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:08,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:08,328 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:55:08,328 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 04:55:08,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 04:55:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2021-06-05 04:55:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.036303630363036) internal successors, (920), 303 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-06-05 04:55:08,332 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 18 [2021-06-05 04:55:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:08,332 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-06-05 04:55:08,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,332 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-06-05 04:55:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:08,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:08,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:08,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:08,537 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 398774047, now seen corresponding path program 5 times [2021-06-05 04:55:08,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:08,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633552387] [2021-06-05 04:55:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:08,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:08,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633552387] [2021-06-05 04:55:08,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633552387] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:08,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:08,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:55:08,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187089745] [2021-06-05 04:55:08,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:55:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:55:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:55:08,577 INFO L87 Difference]: Start difference. First operand 304 states and 920 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:08,646 INFO L93 Difference]: Finished difference Result 514 states and 1465 transitions. [2021-06-05 04:55:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:08,647 INFO L225 Difference]: With dead ends: 514 [2021-06-05 04:55:08,647 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 04:55:08,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 04:55:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 296. [2021-06-05 04:55:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.013559322033898) internal successors, (889), 295 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-06-05 04:55:08,651 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-06-05 04:55:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:08,651 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-06-05 04:55:08,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-06-05 04:55:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:08,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:08,652 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:08,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-06-05 04:55:08,652 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:08,652 INFO L82 PathProgramCache]: Analyzing trace with hash 505869899, now seen corresponding path program 17 times [2021-06-05 04:55:08,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:08,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665208346] [2021-06-05 04:55:08,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:08,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665208346] [2021-06-05 04:55:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665208346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268097992] [2021-06-05 04:55:08,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:08,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:08,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:08,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268097992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:08,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:08,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:08,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710685717] [2021-06-05 04:55:08,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:08,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:08,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:08,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:08,816 INFO L87 Difference]: Start difference. First operand 296 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:09,014 INFO L93 Difference]: Finished difference Result 450 states and 1288 transitions. [2021-06-05 04:55:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:09,015 INFO L225 Difference]: With dead ends: 450 [2021-06-05 04:55:09,015 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 04:55:09,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 04:55:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 304. [2021-06-05 04:55:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0066006600660065) internal successors, (911), 303 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-06-05 04:55:09,019 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 18 [2021-06-05 04:55:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:09,019 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-06-05 04:55:09,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-06-05 04:55:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:09,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:09,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:09,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:09,220 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1484427343, now seen corresponding path program 18 times [2021-06-05 04:55:09,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:09,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371899275] [2021-06-05 04:55:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:09,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:09,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371899275] [2021-06-05 04:55:09,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371899275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:09,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157355739] [2021-06-05 04:55:09,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:09,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:09,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:09,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157355739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:09,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:09,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877216348] [2021-06-05 04:55:09,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:09,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:09,375 INFO L87 Difference]: Start difference. First operand 304 states and 911 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:09,554 INFO L93 Difference]: Finished difference Result 434 states and 1258 transitions. [2021-06-05 04:55:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:09,555 INFO L225 Difference]: With dead ends: 434 [2021-06-05 04:55:09,555 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 04:55:09,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 04:55:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 296. [2021-06-05 04:55:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.013559322033898) internal successors, (889), 295 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-06-05 04:55:09,559 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-06-05 04:55:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:09,559 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-06-05 04:55:09,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-06-05 04:55:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:09,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:09,559 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:09,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 04:55:09,760 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1410127391, now seen corresponding path program 19 times [2021-06-05 04:55:09,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:09,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607002773] [2021-06-05 04:55:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:09,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:09,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607002773] [2021-06-05 04:55:09,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607002773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:09,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343508998] [2021-06-05 04:55:09,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:09,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343508998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:09,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:09,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:09,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157793260] [2021-06-05 04:55:09,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:09,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:09,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:09,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:09,932 INFO L87 Difference]: Start difference. First operand 296 states and 889 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:10,139 INFO L93 Difference]: Finished difference Result 468 states and 1339 transitions. [2021-06-05 04:55:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:10,140 INFO L225 Difference]: With dead ends: 468 [2021-06-05 04:55:10,140 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:55:10,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:55:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 302. [2021-06-05 04:55:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.0232558139534884) internal successors, (910), 301 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 910 transitions. [2021-06-05 04:55:10,144 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 910 transitions. Word has length 18 [2021-06-05 04:55:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:10,144 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 910 transitions. [2021-06-05 04:55:10,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 910 transitions. [2021-06-05 04:55:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:10,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:10,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:10,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:10,346 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1565959223, now seen corresponding path program 20 times [2021-06-05 04:55:10,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:10,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873574314] [2021-06-05 04:55:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:10,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:10,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873574314] [2021-06-05 04:55:10,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873574314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:10,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126987948] [2021-06-05 04:55:10,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:10,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:10,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:10,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:10,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126987948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:10,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:10,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:10,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716360618] [2021-06-05 04:55:10,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:10,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:10,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:10,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:10,588 INFO L87 Difference]: Start difference. First operand 302 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:10,787 INFO L93 Difference]: Finished difference Result 479 states and 1352 transitions. [2021-06-05 04:55:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:10,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:10,788 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:55:10,788 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 04:55:10,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 04:55:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 306. [2021-06-05 04:55:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.036065573770492) internal successors, (926), 305 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-06-05 04:55:10,792 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-06-05 04:55:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:10,792 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-06-05 04:55:10,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-06-05 04:55:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:10,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:10,792 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:11,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:11,008 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -635798047, now seen corresponding path program 21 times [2021-06-05 04:55:11,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:11,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799736381] [2021-06-05 04:55:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:11,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:11,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799736381] [2021-06-05 04:55:11,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799736381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:11,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184731509] [2021-06-05 04:55:11,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:11,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:11,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:11,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:11,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184731509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:11,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:11,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:11,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865473406] [2021-06-05 04:55:11,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:11,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:11,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:11,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:11,183 INFO L87 Difference]: Start difference. First operand 306 states and 926 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:11,394 INFO L93 Difference]: Finished difference Result 442 states and 1266 transitions. [2021-06-05 04:55:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:11,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:11,395 INFO L225 Difference]: With dead ends: 442 [2021-06-05 04:55:11,395 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 04:55:11,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 04:55:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 308. [2021-06-05 04:55:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.019543973941368) internal successors, (927), 307 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-06-05 04:55:11,398 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 18 [2021-06-05 04:55:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:11,398 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-06-05 04:55:11,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-06-05 04:55:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:11,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:11,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:11,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:11,599 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1614261531, now seen corresponding path program 22 times [2021-06-05 04:55:11,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:11,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908960304] [2021-06-05 04:55:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:11,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:11,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908960304] [2021-06-05 04:55:11,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908960304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:11,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649449577] [2021-06-05 04:55:11,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:11,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:11,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:11,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:11,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649449577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:11,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:11,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:11,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498015143] [2021-06-05 04:55:11,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:11,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:11,770 INFO L87 Difference]: Start difference. First operand 308 states and 927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:11,913 INFO L93 Difference]: Finished difference Result 535 states and 1530 transitions. [2021-06-05 04:55:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:11,913 INFO L225 Difference]: With dead ends: 535 [2021-06-05 04:55:11,914 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 04:55:11,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 04:55:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2021-06-05 04:55:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0264900662251657) internal successors, (914), 302 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 914 transitions. [2021-06-05 04:55:11,918 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 914 transitions. Word has length 18 [2021-06-05 04:55:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:11,918 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 914 transitions. [2021-06-05 04:55:11,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 914 transitions. [2021-06-05 04:55:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:11,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:11,918 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:12,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 04:55:12,119 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1839327131, now seen corresponding path program 23 times [2021-06-05 04:55:12,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:12,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801241331] [2021-06-05 04:55:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:12,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:12,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801241331] [2021-06-05 04:55:12,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801241331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:12,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105364636] [2021-06-05 04:55:12,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:12,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:12,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:12,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105364636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:12,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:12,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:12,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959894918] [2021-06-05 04:55:12,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:12,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:12,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:12,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:12,396 INFO L87 Difference]: Start difference. First operand 303 states and 914 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:12,604 INFO L93 Difference]: Finished difference Result 537 states and 1559 transitions. [2021-06-05 04:55:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:12,605 INFO L225 Difference]: With dead ends: 537 [2021-06-05 04:55:12,605 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 04:55:12,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 04:55:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 307. [2021-06-05 04:55:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.052287581699346) internal successors, (934), 306 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 934 transitions. [2021-06-05 04:55:12,610 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 934 transitions. Word has length 18 [2021-06-05 04:55:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:12,610 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 934 transitions. [2021-06-05 04:55:12,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 934 transitions. [2021-06-05 04:55:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:12,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:12,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:12,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:12,825 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash 756919777, now seen corresponding path program 24 times [2021-06-05 04:55:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:12,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803059504] [2021-06-05 04:55:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:12,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803059504] [2021-06-05 04:55:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803059504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650856989] [2021-06-05 04:55:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:12,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:12,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:12,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:12,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650856989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:12,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:12,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:12,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980893694] [2021-06-05 04:55:12,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:12,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:12,998 INFO L87 Difference]: Start difference. First operand 307 states and 934 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:13,118 INFO L93 Difference]: Finished difference Result 500 states and 1473 transitions. [2021-06-05 04:55:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:13,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:13,119 INFO L225 Difference]: With dead ends: 500 [2021-06-05 04:55:13,119 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 04:55:13,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 04:55:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 299. [2021-06-05 04:55:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0134228187919465) internal successors, (898), 298 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-06-05 04:55:13,123 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-06-05 04:55:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:13,123 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-06-05 04:55:13,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-06-05 04:55:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:13,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:13,124 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:13,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 04:55:13,329 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1237003341, now seen corresponding path program 25 times [2021-06-05 04:55:13,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:13,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821004490] [2021-06-05 04:55:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:13,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:13,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821004490] [2021-06-05 04:55:13,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821004490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:13,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780878040] [2021-06-05 04:55:13,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:13,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:13,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780878040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:13,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:13,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:13,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783619062] [2021-06-05 04:55:13,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:13,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:13,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:13,538 INFO L87 Difference]: Start difference. First operand 299 states and 898 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:13,727 INFO L93 Difference]: Finished difference Result 506 states and 1446 transitions. [2021-06-05 04:55:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:13,728 INFO L225 Difference]: With dead ends: 506 [2021-06-05 04:55:13,728 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:55:13,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:55:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-06-05 04:55:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0427631578947367) internal successors, (925), 304 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 925 transitions. [2021-06-05 04:55:13,732 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 925 transitions. Word has length 18 [2021-06-05 04:55:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:13,732 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 925 transitions. [2021-06-05 04:55:13,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 925 transitions. [2021-06-05 04:55:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:13,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:13,733 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:13,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 04:55:13,945 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:13,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:13,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2127802779, now seen corresponding path program 26 times [2021-06-05 04:55:13,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:13,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770743262] [2021-06-05 04:55:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:13,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770743262] [2021-06-05 04:55:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770743262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2407191] [2021-06-05 04:55:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:14,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:14,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2407191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:14,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:14,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:14,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393697279] [2021-06-05 04:55:14,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:14,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:14,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:14,136 INFO L87 Difference]: Start difference. First operand 305 states and 925 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:14,307 INFO L93 Difference]: Finished difference Result 494 states and 1406 transitions. [2021-06-05 04:55:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:14,308 INFO L225 Difference]: With dead ends: 494 [2021-06-05 04:55:14,308 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 04:55:14,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 04:55:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 307. [2021-06-05 04:55:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 04:55:14,312 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 18 [2021-06-05 04:55:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:14,312 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 04:55:14,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 04:55:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:14,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:14,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:14,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 04:55:14,514 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:14,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1507513033, now seen corresponding path program 27 times [2021-06-05 04:55:14,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:14,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626597337] [2021-06-05 04:55:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:14,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:14,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626597337] [2021-06-05 04:55:14,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626597337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:14,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103484398] [2021-06-05 04:55:14,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:14,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:14,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103484398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:14,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:14,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:14,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851741224] [2021-06-05 04:55:14,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:14,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:14,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:14,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:14,749 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:14,974 INFO L93 Difference]: Finished difference Result 509 states and 1449 transitions. [2021-06-05 04:55:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:14,975 INFO L225 Difference]: With dead ends: 509 [2021-06-05 04:55:14,975 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:55:14,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:55:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-06-05 04:55:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.046204620462046) internal successors, (923), 303 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 923 transitions. [2021-06-05 04:55:14,979 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 923 transitions. Word has length 18 [2021-06-05 04:55:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:14,979 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 923 transitions. [2021-06-05 04:55:14,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 923 transitions. [2021-06-05 04:55:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:14,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:14,980 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:15,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:15,181 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1326384585, now seen corresponding path program 28 times [2021-06-05 04:55:15,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:15,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920833982] [2021-06-05 04:55:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:15,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:15,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920833982] [2021-06-05 04:55:15,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920833982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:15,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280240919] [2021-06-05 04:55:15,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:15,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:15,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:15,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:15,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280240919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:15,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:15,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:15,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305793389] [2021-06-05 04:55:15,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:15,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:15,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:15,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:15,326 INFO L87 Difference]: Start difference. First operand 304 states and 923 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:15,439 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-06-05 04:55:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:15,440 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:55:15,440 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 04:55:15,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 04:55:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 300. [2021-06-05 04:55:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.020066889632107) internal successors, (903), 299 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 903 transitions. [2021-06-05 04:55:15,444 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 903 transitions. Word has length 18 [2021-06-05 04:55:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:15,444 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 903 transitions. [2021-06-05 04:55:15,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 903 transitions. [2021-06-05 04:55:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:15,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:15,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:15,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 04:55:15,645 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -554908191, now seen corresponding path program 29 times [2021-06-05 04:55:15,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:15,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678321905] [2021-06-05 04:55:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:15,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:15,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678321905] [2021-06-05 04:55:15,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678321905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:15,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816132210] [2021-06-05 04:55:15,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:15,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816132210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:15,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:15,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:15,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209660565] [2021-06-05 04:55:15,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:15,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:15,792 INFO L87 Difference]: Start difference. First operand 300 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:16,011 INFO L93 Difference]: Finished difference Result 447 states and 1285 transitions. [2021-06-05 04:55:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:16,012 INFO L225 Difference]: With dead ends: 447 [2021-06-05 04:55:16,012 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:55:16,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:55:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 308. [2021-06-05 04:55:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.013029315960912) internal successors, (925), 307 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 925 transitions. [2021-06-05 04:55:16,015 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 925 transitions. Word has length 18 [2021-06-05 04:55:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:16,015 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 925 transitions. [2021-06-05 04:55:16,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 925 transitions. [2021-06-05 04:55:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:16,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:16,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:16,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 04:55:16,223 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash 423649253, now seen corresponding path program 30 times [2021-06-05 04:55:16,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:16,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46247332] [2021-06-05 04:55:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:16,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:16,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46247332] [2021-06-05 04:55:16,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46247332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:16,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92661981] [2021-06-05 04:55:16,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:16,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:16,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:16,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:16,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:16,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92661981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:16,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:16,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:16,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322972922] [2021-06-05 04:55:16,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:16,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:16,409 INFO L87 Difference]: Start difference. First operand 308 states and 925 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:16,600 INFO L93 Difference]: Finished difference Result 431 states and 1255 transitions. [2021-06-05 04:55:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:16,601 INFO L225 Difference]: With dead ends: 431 [2021-06-05 04:55:16,601 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 04:55:16,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 04:55:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 299. [2021-06-05 04:55:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0134228187919465) internal successors, (898), 298 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-06-05 04:55:16,605 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-06-05 04:55:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:16,605 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-06-05 04:55:16,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-06-05 04:55:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:16,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:16,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:16,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 04:55:16,807 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash 427729059, now seen corresponding path program 31 times [2021-06-05 04:55:16,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:16,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423929961] [2021-06-05 04:55:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:16,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:16,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423929961] [2021-06-05 04:55:16,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423929961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982564753] [2021-06-05 04:55:16,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:17,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982564753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:17,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:17,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:17,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263490710] [2021-06-05 04:55:17,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:17,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:17,007 INFO L87 Difference]: Start difference. First operand 299 states and 898 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:17,139 INFO L93 Difference]: Finished difference Result 569 states and 1629 transitions. [2021-06-05 04:55:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:17,140 INFO L225 Difference]: With dead ends: 569 [2021-06-05 04:55:17,140 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:55:17,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:55:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 306. [2021-06-05 04:55:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.036065573770492) internal successors, (926), 305 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-06-05 04:55:17,144 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-06-05 04:55:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:17,144 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-06-05 04:55:17,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-06-05 04:55:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:17,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:17,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:17,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 04:55:17,353 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1635282131, now seen corresponding path program 32 times [2021-06-05 04:55:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:17,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159167401] [2021-06-05 04:55:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:17,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:17,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159167401] [2021-06-05 04:55:17,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159167401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:17,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064096337] [2021-06-05 04:55:17,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:17,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:17,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:17,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064096337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:17,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:17,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:17,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020456861] [2021-06-05 04:55:17,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:17,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:17,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:17,468 INFO L87 Difference]: Start difference. First operand 306 states and 926 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:17,573 INFO L93 Difference]: Finished difference Result 581 states and 1668 transitions. [2021-06-05 04:55:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:17,574 INFO L225 Difference]: With dead ends: 581 [2021-06-05 04:55:17,574 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 04:55:17,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:17,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 04:55:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 310. [2021-06-05 04:55:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0614886731391584) internal successors, (946), 309 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 946 transitions. [2021-06-05 04:55:17,579 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 946 transitions. Word has length 18 [2021-06-05 04:55:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:17,579 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 946 transitions. [2021-06-05 04:55:17,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 946 transitions. [2021-06-05 04:55:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:17,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:17,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:17,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:17,780 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -63438257, now seen corresponding path program 33 times [2021-06-05 04:55:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:17,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134111229] [2021-06-05 04:55:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:17,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:17,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134111229] [2021-06-05 04:55:17,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134111229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:17,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467076149] [2021-06-05 04:55:17,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:17,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:17,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467076149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:17,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:17,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:17,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258321809] [2021-06-05 04:55:17,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:17,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:17,926 INFO L87 Difference]: Start difference. First operand 310 states and 946 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:18,077 INFO L93 Difference]: Finished difference Result 590 states and 1691 transitions. [2021-06-05 04:55:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:18,078 INFO L225 Difference]: With dead ends: 590 [2021-06-05 04:55:18,078 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 04:55:18,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 04:55:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 299. [2021-06-05 04:55:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0134228187919465) internal successors, (898), 298 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-06-05 04:55:18,083 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-06-05 04:55:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:18,083 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-06-05 04:55:18,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-06-05 04:55:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:18,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:18,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:18,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:18,293 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1646468570, now seen corresponding path program 4 times [2021-06-05 04:55:18,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:18,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148457867] [2021-06-05 04:55:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:18,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:18,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148457867] [2021-06-05 04:55:18,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148457867] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:18,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:18,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:55:18,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900387561] [2021-06-05 04:55:18,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:55:18,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:18,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:55:18,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:55:18,337 INFO L87 Difference]: Start difference. First operand 299 states and 898 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:18,409 INFO L93 Difference]: Finished difference Result 429 states and 1249 transitions. [2021-06-05 04:55:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:18,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:18,409 INFO L225 Difference]: With dead ends: 429 [2021-06-05 04:55:18,409 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 04:55:18,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 04:55:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 294. [2021-06-05 04:55:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.0) internal successors, (879), 293 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-06-05 04:55:18,413 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-06-05 04:55:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:18,413 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-06-05 04:55:18,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-06-05 04:55:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:18,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:18,413 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:18,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-06-05 04:55:18,414 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -269670517, now seen corresponding path program 34 times [2021-06-05 04:55:18,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:18,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415046941] [2021-06-05 04:55:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:18,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:18,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415046941] [2021-06-05 04:55:18,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415046941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:18,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230866109] [2021-06-05 04:55:18,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:18,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:18,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230866109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:18,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:18,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:18,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064543774] [2021-06-05 04:55:18,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:18,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:18,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:18,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:18,608 INFO L87 Difference]: Start difference. First operand 294 states and 879 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:18,807 INFO L93 Difference]: Finished difference Result 648 states and 1820 transitions. [2021-06-05 04:55:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:18,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:18,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:18,808 INFO L225 Difference]: With dead ends: 648 [2021-06-05 04:55:18,808 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 04:55:18,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 04:55:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 298. [2021-06-05 04:55:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.993265993265993) internal successors, (889), 297 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 889 transitions. [2021-06-05 04:55:18,812 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 889 transitions. Word has length 18 [2021-06-05 04:55:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:18,812 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 889 transitions. [2021-06-05 04:55:18,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 889 transitions. [2021-06-05 04:55:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:18,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:18,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:19,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 04:55:19,013 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash -472443849, now seen corresponding path program 35 times [2021-06-05 04:55:19,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:19,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653120062] [2021-06-05 04:55:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:19,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:19,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653120062] [2021-06-05 04:55:19,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653120062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:19,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506591500] [2021-06-05 04:55:19,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:19,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:19,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:19,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506591500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:19,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:19,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:19,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829684227] [2021-06-05 04:55:19,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:19,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:19,171 INFO L87 Difference]: Start difference. First operand 298 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:19,380 INFO L93 Difference]: Finished difference Result 606 states and 1708 transitions. [2021-06-05 04:55:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:19,385 INFO L225 Difference]: With dead ends: 606 [2021-06-05 04:55:19,385 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 04:55:19,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 04:55:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 306. [2021-06-05 04:55:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9868852459016395) internal successors, (911), 305 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 911 transitions. [2021-06-05 04:55:19,389 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 911 transitions. Word has length 18 [2021-06-05 04:55:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:19,389 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 911 transitions. [2021-06-05 04:55:19,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 911 transitions. [2021-06-05 04:55:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:19,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:19,390 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:19,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 04:55:19,590 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:19,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:19,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1687803469, now seen corresponding path program 36 times [2021-06-05 04:55:19,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:19,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8256609] [2021-06-05 04:55:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:19,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:19,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8256609] [2021-06-05 04:55:19,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8256609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:19,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854614165] [2021-06-05 04:55:19,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:19,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:19,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:19,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854614165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:19,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:19,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250804473] [2021-06-05 04:55:19,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:19,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:19,757 INFO L87 Difference]: Start difference. First operand 306 states and 911 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:19,948 INFO L93 Difference]: Finished difference Result 590 states and 1678 transitions. [2021-06-05 04:55:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:19,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:19,949 INFO L225 Difference]: With dead ends: 590 [2021-06-05 04:55:19,949 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 04:55:19,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 04:55:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 294. [2021-06-05 04:55:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.0) internal successors, (879), 293 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-06-05 04:55:19,953 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-06-05 04:55:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:19,954 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-06-05 04:55:19,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-06-05 04:55:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:19,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:19,954 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:20,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 04:55:20,155 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:20,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1039285976, now seen corresponding path program 5 times [2021-06-05 04:55:20,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:20,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614634218] [2021-06-05 04:55:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:20,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:20,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614634218] [2021-06-05 04:55:20,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614634218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:20,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616797370] [2021-06-05 04:55:20,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:20,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:20,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:20,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:20,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:20,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616797370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:20,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:20,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 04:55:20,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720162081] [2021-06-05 04:55:20,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:20,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:20,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:20,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:20,266 INFO L87 Difference]: Start difference. First operand 294 states and 879 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:20,324 INFO L93 Difference]: Finished difference Result 448 states and 1287 transitions. [2021-06-05 04:55:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:20,325 INFO L225 Difference]: With dead ends: 448 [2021-06-05 04:55:20,325 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:55:20,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:55:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 287. [2021-06-05 04:55:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.958041958041958) internal successors, (846), 286 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 846 transitions. [2021-06-05 04:55:20,328 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 846 transitions. Word has length 18 [2021-06-05 04:55:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:20,328 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 846 transitions. [2021-06-05 04:55:20,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 846 transitions. [2021-06-05 04:55:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:20,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:20,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:20,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 04:55:20,529 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash -603032005, now seen corresponding path program 37 times [2021-06-05 04:55:20,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:20,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806840660] [2021-06-05 04:55:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:20,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:20,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806840660] [2021-06-05 04:55:20,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806840660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:20,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9406016] [2021-06-05 04:55:20,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:20,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9406016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:20,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:20,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 04:55:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081889457] [2021-06-05 04:55:20,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:20,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:20,720 INFO L87 Difference]: Start difference. First operand 287 states and 846 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:20,874 INFO L93 Difference]: Finished difference Result 610 states and 1732 transitions. [2021-06-05 04:55:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:20,875 INFO L225 Difference]: With dead ends: 610 [2021-06-05 04:55:20,875 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 04:55:20,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 04:55:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 293. [2021-06-05 04:55:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.98972602739726) internal successors, (873), 292 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 873 transitions. [2021-06-05 04:55:20,879 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 873 transitions. Word has length 18 [2021-06-05 04:55:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:20,879 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 873 transitions. [2021-06-05 04:55:20,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 873 transitions. [2021-06-05 04:55:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:20,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:20,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:21,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:21,080 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:21,080 INFO L82 PathProgramCache]: Analyzing trace with hash 327129171, now seen corresponding path program 38 times [2021-06-05 04:55:21,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:21,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857021339] [2021-06-05 04:55:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:21,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:21,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857021339] [2021-06-05 04:55:21,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857021339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:21,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977553456] [2021-06-05 04:55:21,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:21,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:21,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:21,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:21,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977553456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:21,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:21,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:21,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614518696] [2021-06-05 04:55:21,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:21,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:21,242 INFO L87 Difference]: Start difference. First operand 293 states and 873 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:21,400 INFO L93 Difference]: Finished difference Result 598 states and 1692 transitions. [2021-06-05 04:55:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:21,401 INFO L225 Difference]: With dead ends: 598 [2021-06-05 04:55:21,401 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 04:55:21,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 04:55:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 295. [2021-06-05 04:55:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 04:55:21,405 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-06-05 04:55:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:21,405 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 04:55:21,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 04:55:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:21,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:21,406 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:21,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:21,606 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash -332522313, now seen corresponding path program 39 times [2021-06-05 04:55:21,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:21,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009737073] [2021-06-05 04:55:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:21,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:21,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009737073] [2021-06-05 04:55:21,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009737073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:21,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372320210] [2021-06-05 04:55:21,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:21,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:21,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:21,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372320210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:21,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:21,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:55:21,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075148047] [2021-06-05 04:55:21,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:55:21,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:55:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:21,762 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:21,940 INFO L93 Difference]: Finished difference Result 653 states and 1829 transitions. [2021-06-05 04:55:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:21,941 INFO L225 Difference]: With dead ends: 653 [2021-06-05 04:55:21,941 INFO L226 Difference]: Without dead ends: 634 [2021-06-05 04:55:21,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-05 04:55:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 292. [2021-06-05 04:55:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.993127147766323) internal successors, (871), 291 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 871 transitions. [2021-06-05 04:55:21,946 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 871 transitions. Word has length 18 [2021-06-05 04:55:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:21,946 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 871 transitions. [2021-06-05 04:55:21,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 871 transitions. [2021-06-05 04:55:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:21,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:21,946 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:22,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:22,161 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash -513650761, now seen corresponding path program 40 times [2021-06-05 04:55:22,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:22,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490943172] [2021-06-05 04:55:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:22,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:22,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490943172] [2021-06-05 04:55:22,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490943172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:22,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167147539] [2021-06-05 04:55:22,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:22,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:22,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:22,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167147539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:22,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:22,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:22,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292253893] [2021-06-05 04:55:22,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:22,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:22,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:22,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:22,428 INFO L87 Difference]: Start difference. First operand 292 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:22,597 INFO L93 Difference]: Finished difference Result 634 states and 1800 transitions. [2021-06-05 04:55:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:22,598 INFO L225 Difference]: With dead ends: 634 [2021-06-05 04:55:22,598 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 04:55:22,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:22,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 04:55:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 288. [2021-06-05 04:55:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.965156794425087) internal successors, (851), 287 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 851 transitions. [2021-06-05 04:55:22,604 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 851 transitions. Word has length 18 [2021-06-05 04:55:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:22,604 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 851 transitions. [2021-06-05 04:55:22,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 851 transitions. [2021-06-05 04:55:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:22,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:22,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:22,821 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1900023759, now seen corresponding path program 41 times [2021-06-05 04:55:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:22,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257158343] [2021-06-05 04:55:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:22,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257158343] [2021-06-05 04:55:22,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257158343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:22,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656107100] [2021-06-05 04:55:22,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:22,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:22,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:22,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:22,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:23,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656107100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:23,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:23,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:23,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318866670] [2021-06-05 04:55:23,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:23,024 INFO L87 Difference]: Start difference. First operand 288 states and 851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:23,249 INFO L93 Difference]: Finished difference Result 606 states and 1702 transitions. [2021-06-05 04:55:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:23,250 INFO L225 Difference]: With dead ends: 606 [2021-06-05 04:55:23,250 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 04:55:23,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 04:55:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 296. [2021-06-05 04:55:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9593220338983053) internal successors, (873), 295 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 873 transitions. [2021-06-05 04:55:23,255 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 873 transitions. Word has length 18 [2021-06-05 04:55:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:23,255 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 873 transitions. [2021-06-05 04:55:23,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 873 transitions. [2021-06-05 04:55:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:23,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:23,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:23,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 04:55:23,469 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1416386093, now seen corresponding path program 42 times [2021-06-05 04:55:23,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:23,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136946020] [2021-06-05 04:55:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:23,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136946020] [2021-06-05 04:55:23,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136946020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746376336] [2021-06-05 04:55:23,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:23,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:23,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:23,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:23,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746376336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:23,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:23,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:23,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695614837] [2021-06-05 04:55:23,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:23,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:23,638 INFO L87 Difference]: Start difference. First operand 296 states and 873 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:23,884 INFO L93 Difference]: Finished difference Result 590 states and 1672 transitions. [2021-06-05 04:55:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:23,885 INFO L225 Difference]: With dead ends: 590 [2021-06-05 04:55:23,885 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 04:55:23,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 04:55:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 285. [2021-06-05 04:55:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9507042253521125) internal successors, (838), 284 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-06-05 04:55:23,889 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-06-05 04:55:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:23,889 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-06-05 04:55:23,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-06-05 04:55:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:23,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:23,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:24,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 04:55:24,101 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1542604225, now seen corresponding path program 43 times [2021-06-05 04:55:24,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:24,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946123103] [2021-06-05 04:55:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:24,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:24,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946123103] [2021-06-05 04:55:24,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946123103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:24,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730208113] [2021-06-05 04:55:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:24,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730208113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:24,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:24,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:24,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60958591] [2021-06-05 04:55:24,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:24,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:24,298 INFO L87 Difference]: Start difference. First operand 285 states and 838 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:24,570 INFO L93 Difference]: Finished difference Result 479 states and 1339 transitions. [2021-06-05 04:55:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:24,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:24,571 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:55:24,571 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 04:55:24,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:24,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 04:55:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 289. [2021-06-05 04:55:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9444444444444446) internal successors, (848), 288 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 848 transitions. [2021-06-05 04:55:24,575 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 848 transitions. Word has length 18 [2021-06-05 04:55:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:24,575 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 848 transitions. [2021-06-05 04:55:24,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 848 transitions. [2021-06-05 04:55:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:24,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:24,583 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:24,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:24,784 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1745377557, now seen corresponding path program 44 times [2021-06-05 04:55:24,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:24,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441965273] [2021-06-05 04:55:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:24,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:24,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441965273] [2021-06-05 04:55:24,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441965273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:24,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744420777] [2021-06-05 04:55:24,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:24,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:25,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744420777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:25,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:25,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:25,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657614657] [2021-06-05 04:55:25,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:25,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:25,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:25,017 INFO L87 Difference]: Start difference. First operand 289 states and 848 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:25,249 INFO L93 Difference]: Finished difference Result 485 states and 1345 transitions. [2021-06-05 04:55:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:25,250 INFO L225 Difference]: With dead ends: 485 [2021-06-05 04:55:25,250 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 04:55:25,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 04:55:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 297. [2021-06-05 04:55:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.939189189189189) internal successors, (870), 296 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 870 transitions. [2021-06-05 04:55:25,254 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 870 transitions. Word has length 18 [2021-06-05 04:55:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:25,254 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 870 transitions. [2021-06-05 04:55:25,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 870 transitions. [2021-06-05 04:55:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:25,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:25,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:25,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 04:55:25,455 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:25,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1334230119, now seen corresponding path program 45 times [2021-06-05 04:55:25,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:25,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279084225] [2021-06-05 04:55:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:25,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:25,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279084225] [2021-06-05 04:55:25,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279084225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:25,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308765104] [2021-06-05 04:55:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:25,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:25,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:25,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:25,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308765104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:25,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:25,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:25,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138642062] [2021-06-05 04:55:25,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:25,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:25,621 INFO L87 Difference]: Start difference. First operand 297 states and 870 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:25,894 INFO L93 Difference]: Finished difference Result 469 states and 1315 transitions. [2021-06-05 04:55:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:25,895 INFO L225 Difference]: With dead ends: 469 [2021-06-05 04:55:25,895 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 04:55:25,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 04:55:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 285. [2021-06-05 04:55:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9507042253521125) internal successors, (838), 284 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-06-05 04:55:25,898 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-06-05 04:55:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:25,899 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-06-05 04:55:25,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-06-05 04:55:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:25,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:25,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:26,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-06-05 04:55:26,100 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:26,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1633409787, now seen corresponding path program 46 times [2021-06-05 04:55:26,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:26,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754310788] [2021-06-05 04:55:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:26,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:26,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754310788] [2021-06-05 04:55:26,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754310788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:26,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697829239] [2021-06-05 04:55:26,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:26,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:26,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697829239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:26,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:26,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:26,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295058216] [2021-06-05 04:55:26,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:26,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:26,257 INFO L87 Difference]: Start difference. First operand 285 states and 838 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:26,462 INFO L93 Difference]: Finished difference Result 433 states and 1220 transitions. [2021-06-05 04:55:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:26,462 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:26,463 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:55:26,463 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 04:55:26,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 04:55:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 287. [2021-06-05 04:55:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9475524475524475) internal successors, (843), 286 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 843 transitions. [2021-06-05 04:55:26,466 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 843 transitions. Word has length 18 [2021-06-05 04:55:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:26,467 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 843 transitions. [2021-06-05 04:55:26,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 843 transitions. [2021-06-05 04:55:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:26,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:26,467 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:26,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:26,668 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash 44908247, now seen corresponding path program 6 times [2021-06-05 04:55:26,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:26,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453757679] [2021-06-05 04:55:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:26,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:26,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453757679] [2021-06-05 04:55:26,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453757679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:26,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782832807] [2021-06-05 04:55:26,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:26,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:26,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:55:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:26,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782832807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:26,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:26,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:26,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027015086] [2021-06-05 04:55:26,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:26,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:26,789 INFO L87 Difference]: Start difference. First operand 287 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:26,936 INFO L93 Difference]: Finished difference Result 476 states and 1332 transitions. [2021-06-05 04:55:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:26,937 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:55:26,937 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 04:55:26,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 04:55:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 289. [2021-06-05 04:55:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.951388888888889) internal successors, (850), 288 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-06-05 04:55:26,940 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-06-05 04:55:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:26,941 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-06-05 04:55:26,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-06-05 04:55:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:26,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:26,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:27,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 04:55:27,142 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash -675858551, now seen corresponding path program 47 times [2021-06-05 04:55:27,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:27,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067558496] [2021-06-05 04:55:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:27,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:27,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067558496] [2021-06-05 04:55:27,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067558496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:27,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823405400] [2021-06-05 04:55:27,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:27,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:27,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:27,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:27,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823405400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:27,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:27,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:27,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187897462] [2021-06-05 04:55:27,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:27,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:27,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:27,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:27,295 INFO L87 Difference]: Start difference. First operand 289 states and 850 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:27,520 INFO L93 Difference]: Finished difference Result 434 states and 1224 transitions. [2021-06-05 04:55:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:27,521 INFO L225 Difference]: With dead ends: 434 [2021-06-05 04:55:27,521 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 04:55:27,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 04:55:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 297. [2021-06-05 04:55:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9527027027027026) internal successors, (874), 296 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-06-05 04:55:27,524 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-06-05 04:55:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:27,524 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-06-05 04:55:27,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-06-05 04:55:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:27,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:27,525 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:27,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:27,726 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 438614075, now seen corresponding path program 7 times [2021-06-05 04:55:27,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:27,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291338034] [2021-06-05 04:55:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:27,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:27,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291338034] [2021-06-05 04:55:27,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291338034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:27,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443415068] [2021-06-05 04:55:27,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:55:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:27,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443415068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:27,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:27,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:27,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917628588] [2021-06-05 04:55:27,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:27,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:27,861 INFO L87 Difference]: Start difference. First operand 297 states and 874 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:27,983 INFO L93 Difference]: Finished difference Result 491 states and 1363 transitions. [2021-06-05 04:55:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:27,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:27,984 INFO L225 Difference]: With dead ends: 491 [2021-06-05 04:55:27,984 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 04:55:27,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 04:55:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 297. [2021-06-05 04:55:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9527027027027026) internal successors, (874), 296 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-06-05 04:55:27,988 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-06-05 04:55:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:27,988 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-06-05 04:55:27,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-06-05 04:55:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:27,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:27,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:28,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2021-06-05 04:55:28,189 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:28,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1891218171, now seen corresponding path program 48 times [2021-06-05 04:55:28,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:28,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308090186] [2021-06-05 04:55:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:28,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:28,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308090186] [2021-06-05 04:55:28,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308090186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:28,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745596925] [2021-06-05 04:55:28,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:28,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:28,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:28,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:28,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745596925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:28,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:28,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:28,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49553355] [2021-06-05 04:55:28,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:28,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:28,357 INFO L87 Difference]: Start difference. First operand 297 states and 874 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:28,581 INFO L93 Difference]: Finished difference Result 409 states and 1172 transitions. [2021-06-05 04:55:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:28,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:28,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:28,582 INFO L225 Difference]: With dead ends: 409 [2021-06-05 04:55:28,582 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:55:28,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:55:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 291. [2021-06-05 04:55:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-06-05 04:55:28,586 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 18 [2021-06-05 04:55:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:28,586 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-06-05 04:55:28,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-06-05 04:55:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:28,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:28,586 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:28,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 04:55:28,787 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1494230001, now seen corresponding path program 8 times [2021-06-05 04:55:28,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:28,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151277252] [2021-06-05 04:55:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:28,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151277252] [2021-06-05 04:55:28,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151277252] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:28,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:28,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 04:55:28,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528269027] [2021-06-05 04:55:28,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:55:28,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:55:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:55:28,831 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:28,936 INFO L93 Difference]: Finished difference Result 449 states and 1262 transitions. [2021-06-05 04:55:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:28,937 INFO L225 Difference]: With dead ends: 449 [2021-06-05 04:55:28,937 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 04:55:28,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 04:55:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 289. [2021-06-05 04:55:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.951388888888889) internal successors, (850), 288 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-06-05 04:55:28,940 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-06-05 04:55:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:28,940 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-06-05 04:55:28,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-06-05 04:55:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:28,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:28,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:28,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-06-05 04:55:28,941 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1770591994, now seen corresponding path program 6 times [2021-06-05 04:55:28,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:28,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925711236] [2021-06-05 04:55:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:28,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:28,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925711236] [2021-06-05 04:55:28,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925711236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:28,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193943444] [2021-06-05 04:55:28,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:29,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:29,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:29,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:55:29,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:29,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193943444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:29,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:29,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 04:55:29,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880475530] [2021-06-05 04:55:29,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:29,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:29,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:29,081 INFO L87 Difference]: Start difference. First operand 289 states and 850 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:29,197 INFO L93 Difference]: Finished difference Result 435 states and 1232 transitions. [2021-06-05 04:55:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:29,198 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:55:29,198 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:55:29,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:55:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 255. [2021-06-05 04:55:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9803149606299213) internal successors, (757), 254 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 757 transitions. [2021-06-05 04:55:29,201 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 757 transitions. Word has length 18 [2021-06-05 04:55:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:29,201 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 757 transitions. [2021-06-05 04:55:29,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 757 transitions. [2021-06-05 04:55:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:29,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:29,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:29,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:29,409 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:29,409 INFO L82 PathProgramCache]: Analyzing trace with hash 698798277, now seen corresponding path program 49 times [2021-06-05 04:55:29,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:29,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902753825] [2021-06-05 04:55:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:29,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:29,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902753825] [2021-06-05 04:55:29,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902753825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:29,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401208368] [2021-06-05 04:55:29,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:29,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:29,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401208368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:29,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:29,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 04:55:29,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401394763] [2021-06-05 04:55:29,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:29,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:29,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:29,567 INFO L87 Difference]: Start difference. First operand 255 states and 757 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:29,766 INFO L93 Difference]: Finished difference Result 457 states and 1299 transitions. [2021-06-05 04:55:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:29,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:29,767 INFO L225 Difference]: With dead ends: 457 [2021-06-05 04:55:29,767 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:55:29,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:55:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 260. [2021-06-05 04:55:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.996138996138996) internal successors, (776), 259 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-06-05 04:55:29,770 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 18 [2021-06-05 04:55:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:29,771 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-06-05 04:55:29,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-06-05 04:55:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:29,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:29,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:29,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:29,977 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:29,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1628959453, now seen corresponding path program 50 times [2021-06-05 04:55:29,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:29,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225964212] [2021-06-05 04:55:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:30,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:30,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225964212] [2021-06-05 04:55:30,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225964212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:30,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944740212] [2021-06-05 04:55:30,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:30,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:30,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:30,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944740212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:30,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:30,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:30,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358365190] [2021-06-05 04:55:30,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:30,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:30,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:30,127 INFO L87 Difference]: Start difference. First operand 260 states and 776 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:30,346 INFO L93 Difference]: Finished difference Result 461 states and 1299 transitions. [2021-06-05 04:55:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:30,347 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:55:30,347 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:55:30,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:55:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 258. [2021-06-05 04:55:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-06-05 04:55:30,351 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 18 [2021-06-05 04:55:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:30,351 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-06-05 04:55:30,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-06-05 04:55:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:30,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:30,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:30,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:30,552 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash 616266921, now seen corresponding path program 51 times [2021-06-05 04:55:30,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:30,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075146307] [2021-06-05 04:55:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:30,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:30,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075146307] [2021-06-05 04:55:30,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075146307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:30,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040341826] [2021-06-05 04:55:30,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:30,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:30,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:30,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:30,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040341826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:30,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:30,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345039609] [2021-06-05 04:55:30,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:30,678 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:30,900 INFO L93 Difference]: Finished difference Result 455 states and 1280 transitions. [2021-06-05 04:55:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:30,900 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:30,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:30,901 INFO L225 Difference]: With dead ends: 455 [2021-06-05 04:55:30,901 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:55:30,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:55:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 258. [2021-06-05 04:55:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9844357976653697) internal successors, (767), 257 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 767 transitions. [2021-06-05 04:55:30,904 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 767 transitions. Word has length 18 [2021-06-05 04:55:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:30,904 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 767 transitions. [2021-06-05 04:55:30,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 767 transitions. [2021-06-05 04:55:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:30,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:30,904 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:31,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 04:55:31,105 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1345274345, now seen corresponding path program 9 times [2021-06-05 04:55:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:31,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764925725] [2021-06-05 04:55:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:31,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764925725] [2021-06-05 04:55:31,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764925725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208068746] [2021-06-05 04:55:31,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:31,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:31,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208068746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:31,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 04:55:31,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092835498] [2021-06-05 04:55:31,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:55:31,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:55:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:55:31,189 INFO L87 Difference]: Start difference. First operand 258 states and 767 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:31,232 INFO L93 Difference]: Finished difference Result 393 states and 1148 transitions. [2021-06-05 04:55:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:31,232 INFO L225 Difference]: With dead ends: 393 [2021-06-05 04:55:31,232 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 04:55:31,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 04:55:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 247. [2021-06-05 04:55:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9878048780487805) internal successors, (735), 246 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 735 transitions. [2021-06-05 04:55:31,235 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 735 transitions. Word has length 18 [2021-06-05 04:55:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:31,235 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 735 transitions. [2021-06-05 04:55:31,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 735 transitions. [2021-06-05 04:55:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:31,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:31,236 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:31,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 04:55:31,442 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1782534729, now seen corresponding path program 52 times [2021-06-05 04:55:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:31,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38760030] [2021-06-05 04:55:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:31,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38760030] [2021-06-05 04:55:31,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38760030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015058156] [2021-06-05 04:55:31,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:31,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:31,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:31,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015058156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:31,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 04:55:31,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405032979] [2021-06-05 04:55:31,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:31,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:31,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:31,581 INFO L87 Difference]: Start difference. First operand 247 states and 735 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:31,743 INFO L93 Difference]: Finished difference Result 487 states and 1353 transitions. [2021-06-05 04:55:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:31,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:31,743 INFO L225 Difference]: With dead ends: 487 [2021-06-05 04:55:31,743 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 04:55:31,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 04:55:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 253. [2021-06-05 04:55:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.0277777777777777) internal successors, (763), 252 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-06-05 04:55:31,747 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 18 [2021-06-05 04:55:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:31,747 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-06-05 04:55:31,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-06-05 04:55:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:31,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:31,747 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:31,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 04:55:31,948 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1582271391, now seen corresponding path program 53 times [2021-06-05 04:55:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:31,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752104373] [2021-06-05 04:55:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:31,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752104373] [2021-06-05 04:55:31,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752104373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75996224] [2021-06-05 04:55:31,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:32,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:32,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:32,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75996224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:32,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:32,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:32,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666152021] [2021-06-05 04:55:32,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:32,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:32,079 INFO L87 Difference]: Start difference. First operand 253 states and 763 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:32,257 INFO L93 Difference]: Finished difference Result 491 states and 1353 transitions. [2021-06-05 04:55:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:32,258 INFO L225 Difference]: With dead ends: 491 [2021-06-05 04:55:32,258 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 04:55:32,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 04:55:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-06-05 04:55:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0078740157480315) internal successors, (764), 254 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 764 transitions. [2021-06-05 04:55:32,261 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 764 transitions. Word has length 18 [2021-06-05 04:55:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:32,261 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 764 transitions. [2021-06-05 04:55:32,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 764 transitions. [2021-06-05 04:55:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:32,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:32,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:32,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:32,477 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash -951095685, now seen corresponding path program 10 times [2021-06-05 04:55:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:32,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128260756] [2021-06-05 04:55:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:32,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:32,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128260756] [2021-06-05 04:55:32,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128260756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:32,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809077194] [2021-06-05 04:55:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:32,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:32,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:32,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:32,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809077194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:32,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:32,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 04:55:32,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056369737] [2021-06-05 04:55:32,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:32,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:32,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:32,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:32,599 INFO L87 Difference]: Start difference. First operand 255 states and 764 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:32,647 INFO L93 Difference]: Finished difference Result 360 states and 1024 transitions. [2021-06-05 04:55:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:32,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:32,647 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:55:32,647 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 04:55:32,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 04:55:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 249. [2021-06-05 04:55:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.971774193548387) internal successors, (737), 248 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 737 transitions. [2021-06-05 04:55:32,650 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 737 transitions. Word has length 18 [2021-06-05 04:55:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:32,650 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 737 transitions. [2021-06-05 04:55:32,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 737 transitions. [2021-06-05 04:55:32,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:32,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:32,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:32,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 04:55:32,867 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:32,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2053044421, now seen corresponding path program 54 times [2021-06-05 04:55:32,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:32,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6149433] [2021-06-05 04:55:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:32,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:32,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6149433] [2021-06-05 04:55:32,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6149433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:32,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519026394] [2021-06-05 04:55:32,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:32,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:32,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:32,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:33,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519026394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:33,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:33,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:55:33,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768631905] [2021-06-05 04:55:33,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:55:33,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:33,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:55:33,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:33,049 INFO L87 Difference]: Start difference. First operand 249 states and 737 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:33,234 INFO L93 Difference]: Finished difference Result 461 states and 1276 transitions. [2021-06-05 04:55:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:33,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:33,235 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:55:33,235 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 04:55:33,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 04:55:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 246. [2021-06-05 04:55:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.9959183673469387) internal successors, (734), 245 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 734 transitions. [2021-06-05 04:55:33,238 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 734 transitions. Word has length 18 [2021-06-05 04:55:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:33,238 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 734 transitions. [2021-06-05 04:55:33,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 734 transitions. [2021-06-05 04:55:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:33,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:33,239 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:33,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:33,439 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1871915973, now seen corresponding path program 55 times [2021-06-05 04:55:33,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:33,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546157897] [2021-06-05 04:55:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:33,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:33,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546157897] [2021-06-05 04:55:33,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546157897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:33,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824035770] [2021-06-05 04:55:33,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:33,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824035770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:33,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:33,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:33,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111617706] [2021-06-05 04:55:33,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:33,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:33,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:33,587 INFO L87 Difference]: Start difference. First operand 246 states and 734 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:33,703 INFO L93 Difference]: Finished difference Result 433 states and 1225 transitions. [2021-06-05 04:55:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:33,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:33,704 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:55:33,704 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:55:33,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:55:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 242. [2021-06-05 04:55:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.962655601659751) internal successors, (714), 241 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 714 transitions. [2021-06-05 04:55:33,707 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 714 transitions. Word has length 18 [2021-06-05 04:55:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:33,707 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 714 transitions. [2021-06-05 04:55:33,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 714 transitions. [2021-06-05 04:55:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:33,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:33,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:33,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:33,908 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -116472655, now seen corresponding path program 11 times [2021-06-05 04:55:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:33,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176192921] [2021-06-05 04:55:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:33,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:33,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176192921] [2021-06-05 04:55:33,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176192921] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:55:33,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:55:33,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:55:33,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348874567] [2021-06-05 04:55:33,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:55:33,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:55:33,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:55:33,947 INFO L87 Difference]: Start difference. First operand 242 states and 714 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:34,006 INFO L93 Difference]: Finished difference Result 287 states and 821 transitions. [2021-06-05 04:55:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:55:34,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:34,007 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:55:34,007 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 04:55:34,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 04:55:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 210. [2021-06-05 04:55:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.9330143540669855) internal successors, (613), 209 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 613 transitions. [2021-06-05 04:55:34,010 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 613 transitions. Word has length 18 [2021-06-05 04:55:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:34,010 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 613 transitions. [2021-06-05 04:55:34,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 613 transitions. [2021-06-05 04:55:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:34,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:34,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:34,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-06-05 04:55:34,011 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:34,011 INFO L82 PathProgramCache]: Analyzing trace with hash -9376803, now seen corresponding path program 56 times [2021-06-05 04:55:34,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:34,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982869873] [2021-06-05 04:55:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:34,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:34,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982869873] [2021-06-05 04:55:34,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982869873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:34,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104200847] [2021-06-05 04:55:34,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:34,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:34,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:34,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104200847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:34,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:34,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:55:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180111480] [2021-06-05 04:55:34,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:34,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:34,164 INFO L87 Difference]: Start difference. First operand 210 states and 613 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:34,400 INFO L93 Difference]: Finished difference Result 427 states and 1174 transitions. [2021-06-05 04:55:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:34,401 INFO L225 Difference]: With dead ends: 427 [2021-06-05 04:55:34,401 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 04:55:34,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 04:55:34,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 218. [2021-06-05 04:55:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9262672811059907) internal successors, (635), 217 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 635 transitions. [2021-06-05 04:55:34,404 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 635 transitions. Word has length 18 [2021-06-05 04:55:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:34,404 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 635 transitions. [2021-06-05 04:55:34,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 635 transitions. [2021-06-05 04:55:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:34,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:34,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:34,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 04:55:34,605 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 969180641, now seen corresponding path program 57 times [2021-06-05 04:55:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:34,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404909582] [2021-06-05 04:55:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:34,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404909582] [2021-06-05 04:55:34,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404909582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:34,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264634395] [2021-06-05 04:55:34,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:34,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:34,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:34,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264634395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:34,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:34,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:34,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962405455] [2021-06-05 04:55:34,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:34,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:34,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:34,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:34,746 INFO L87 Difference]: Start difference. First operand 218 states and 635 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:34,923 INFO L93 Difference]: Finished difference Result 411 states and 1144 transitions. [2021-06-05 04:55:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:34,923 INFO L225 Difference]: With dead ends: 411 [2021-06-05 04:55:34,923 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 04:55:34,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 04:55:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 209. [2021-06-05 04:55:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.923076923076923) internal successors, (608), 208 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-06-05 04:55:34,926 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-06-05 04:55:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:34,926 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-06-05 04:55:34,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-06-05 04:55:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:34,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:34,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:35,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:35,127 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358893, now seen corresponding path program 58 times [2021-06-05 04:55:35,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:35,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980318146] [2021-06-05 04:55:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:35,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:35,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980318146] [2021-06-05 04:55:35,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980318146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:35,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864003328] [2021-06-05 04:55:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:35,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864003328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:35,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:35,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:35,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020042432] [2021-06-05 04:55:35,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:35,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:35,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:35,252 INFO L87 Difference]: Start difference. First operand 209 states and 608 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:35,454 INFO L93 Difference]: Finished difference Result 371 states and 1026 transitions. [2021-06-05 04:55:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:35,455 INFO L225 Difference]: With dead ends: 371 [2021-06-05 04:55:35,455 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 04:55:35,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 04:55:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 211. [2021-06-05 04:55:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.919047619047619) internal successors, (613), 210 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 613 transitions. [2021-06-05 04:55:35,458 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 613 transitions. Word has length 18 [2021-06-05 04:55:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:35,458 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 613 transitions. [2021-06-05 04:55:35,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 613 transitions. [2021-06-05 04:55:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:35,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:35,458 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:35,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:35,659 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1750676137, now seen corresponding path program 59 times [2021-06-05 04:55:35,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:35,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336034137] [2021-06-05 04:55:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:35,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:35,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336034137] [2021-06-05 04:55:35,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336034137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:35,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691094096] [2021-06-05 04:55:35,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:35,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:35,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:35,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691094096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:35,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:35,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:35,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831541608] [2021-06-05 04:55:35,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:35,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:35,815 INFO L87 Difference]: Start difference. First operand 211 states and 613 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:36,040 INFO L93 Difference]: Finished difference Result 363 states and 1008 transitions. [2021-06-05 04:55:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:36,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:36,041 INFO L225 Difference]: With dead ends: 363 [2021-06-05 04:55:36,041 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 04:55:36,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 04:55:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 219. [2021-06-05 04:55:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9128440366972477) internal successors, (635), 218 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 635 transitions. [2021-06-05 04:55:36,044 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 635 transitions. Word has length 18 [2021-06-05 04:55:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:36,044 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 635 transitions. [2021-06-05 04:55:36,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 635 transitions. [2021-06-05 04:55:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:36,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:36,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:36,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 04:55:36,249 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1565733715, now seen corresponding path program 60 times [2021-06-05 04:55:36,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:36,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673124] [2021-06-05 04:55:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:36,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:36,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673124] [2021-06-05 04:55:36,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:36,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852987532] [2021-06-05 04:55:36,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:36,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:36,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:36,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852987532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:36,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:36,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:36,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091509221] [2021-06-05 04:55:36,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:36,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:36,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:36,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:36,399 INFO L87 Difference]: Start difference. First operand 219 states and 635 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:36,619 INFO L93 Difference]: Finished difference Result 338 states and 956 transitions. [2021-06-05 04:55:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:36,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:36,620 INFO L225 Difference]: With dead ends: 338 [2021-06-05 04:55:36,620 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 04:55:36,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 04:55:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 209. [2021-06-05 04:55:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.923076923076923) internal successors, (608), 208 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-06-05 04:55:36,623 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-06-05 04:55:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:36,623 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-06-05 04:55:36,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-06-05 04:55:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:36,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:36,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:36,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:36,824 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:36,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2071414893, now seen corresponding path program 61 times [2021-06-05 04:55:36,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:36,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449587547] [2021-06-05 04:55:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:36,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:36,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449587547] [2021-06-05 04:55:36,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449587547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:36,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563291857] [2021-06-05 04:55:36,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:36,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563291857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:36,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:36,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:36,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372269943] [2021-06-05 04:55:36,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:36,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:36,993 INFO L87 Difference]: Start difference. First operand 209 states and 608 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:37,235 INFO L93 Difference]: Finished difference Result 369 states and 1028 transitions. [2021-06-05 04:55:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:37,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:37,235 INFO L225 Difference]: With dead ends: 369 [2021-06-05 04:55:37,236 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 04:55:37,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 04:55:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 214. [2021-06-05 04:55:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.92018779342723) internal successors, (622), 213 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 622 transitions. [2021-06-05 04:55:37,238 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 622 transitions. Word has length 18 [2021-06-05 04:55:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:37,238 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 622 transitions. [2021-06-05 04:55:37,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 622 transitions. [2021-06-05 04:55:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:37,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:37,239 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:37,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 04:55:37,439 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:37,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2067720571, now seen corresponding path program 62 times [2021-06-05 04:55:37,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:37,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662439407] [2021-06-05 04:55:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:37,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:37,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662439407] [2021-06-05 04:55:37,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662439407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:37,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308797637] [2021-06-05 04:55:37,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:37,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:37,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:37,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:37,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308797637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:37,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:37,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:37,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006569777] [2021-06-05 04:55:37,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:37,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:37,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:37,625 INFO L87 Difference]: Start difference. First operand 214 states and 622 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:37,901 INFO L93 Difference]: Finished difference Result 412 states and 1121 transitions. [2021-06-05 04:55:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:37,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:37,902 INFO L225 Difference]: With dead ends: 412 [2021-06-05 04:55:37,902 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 04:55:37,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 04:55:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-06-05 04:55:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.925581395348837) internal successors, (629), 215 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 629 transitions. [2021-06-05 04:55:37,905 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 629 transitions. Word has length 18 [2021-06-05 04:55:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:37,905 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 629 transitions. [2021-06-05 04:55:37,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 629 transitions. [2021-06-05 04:55:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:37,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:37,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:38,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 04:55:38,121 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:38,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:38,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1297085549, now seen corresponding path program 63 times [2021-06-05 04:55:38,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:38,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187271872] [2021-06-05 04:55:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:38,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:38,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187271872] [2021-06-05 04:55:38,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187271872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:38,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153375699] [2021-06-05 04:55:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:38,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:38,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153375699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:38,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:38,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:38,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667898390] [2021-06-05 04:55:38,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:38,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:38,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:38,315 INFO L87 Difference]: Start difference. First operand 216 states and 629 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:38,544 INFO L93 Difference]: Finished difference Result 375 states and 1035 transitions. [2021-06-05 04:55:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:38,544 INFO L225 Difference]: With dead ends: 375 [2021-06-05 04:55:38,544 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 04:55:38,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 04:55:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-06-05 04:55:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-06-05 04:55:38,547 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-06-05 04:55:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:38,547 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-06-05 04:55:38,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-06-05 04:55:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:38,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:38,548 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:38,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:38,748 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1181922291, now seen corresponding path program 64 times [2021-06-05 04:55:38,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:38,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839429838] [2021-06-05 04:55:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:38,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839429838] [2021-06-05 04:55:38,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839429838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149348798] [2021-06-05 04:55:38,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:38,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:38,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:38,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149348798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:38,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:38,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:38,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426525273] [2021-06-05 04:55:38,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:38,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:38,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:38,937 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:39,180 INFO L93 Difference]: Finished difference Result 392 states and 1071 transitions. [2021-06-05 04:55:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:39,180 INFO L225 Difference]: With dead ends: 392 [2021-06-05 04:55:39,181 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 04:55:39,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 04:55:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-06-05 04:55:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9348837209302325) internal successors, (631), 215 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 631 transitions. [2021-06-05 04:55:39,183 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 631 transitions. Word has length 18 [2021-06-05 04:55:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:39,184 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 631 transitions. [2021-06-05 04:55:39,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 631 transitions. [2021-06-05 04:55:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:39,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:39,184 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:39,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:39,384 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:39,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2112083467, now seen corresponding path program 65 times [2021-06-05 04:55:39,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:39,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294355932] [2021-06-05 04:55:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:39,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294355932] [2021-06-05 04:55:39,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294355932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648570663] [2021-06-05 04:55:39,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:39,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:39,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648570663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:39,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:39,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:39,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781672391] [2021-06-05 04:55:39,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:39,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:39,572 INFO L87 Difference]: Start difference. First operand 216 states and 631 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:39,815 INFO L93 Difference]: Finished difference Result 396 states and 1071 transitions. [2021-06-05 04:55:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:39,815 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:55:39,815 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 04:55:39,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 04:55:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 214. [2021-06-05 04:55:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9295774647887325) internal successors, (624), 213 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 624 transitions. [2021-06-05 04:55:39,819 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 624 transitions. Word has length 18 [2021-06-05 04:55:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:39,819 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 624 transitions. [2021-06-05 04:55:39,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 624 transitions. [2021-06-05 04:55:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:39,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:39,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:40,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 04:55:40,020 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:40,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1099390935, now seen corresponding path program 66 times [2021-06-05 04:55:40,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:40,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207975790] [2021-06-05 04:55:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:40,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:40,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207975790] [2021-06-05 04:55:40,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207975790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:40,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242579777] [2021-06-05 04:55:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:40,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:40,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:40,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:40,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242579777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:40,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:40,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:40,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874038348] [2021-06-05 04:55:40,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:40,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:40,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:40,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:40,176 INFO L87 Difference]: Start difference. First operand 214 states and 624 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:40,391 INFO L93 Difference]: Finished difference Result 361 states and 998 transitions. [2021-06-05 04:55:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:40,392 INFO L225 Difference]: With dead ends: 361 [2021-06-05 04:55:40,392 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 04:55:40,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 04:55:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 212. [2021-06-05 04:55:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-06-05 04:55:40,395 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-06-05 04:55:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:40,395 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-06-05 04:55:40,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-06-05 04:55:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:40,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:40,395 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:40,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:40,596 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1459644047, now seen corresponding path program 67 times [2021-06-05 04:55:40,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:40,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248361986] [2021-06-05 04:55:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:40,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248361986] [2021-06-05 04:55:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248361986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470155723] [2021-06-05 04:55:40,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:40,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:40,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:40,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470155723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:40,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:40,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:40,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595635854] [2021-06-05 04:55:40,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:40,746 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:40,955 INFO L93 Difference]: Finished difference Result 491 states and 1355 transitions. [2021-06-05 04:55:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:40,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:40,956 INFO L225 Difference]: With dead ends: 491 [2021-06-05 04:55:40,956 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:55:40,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:55:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 218. [2021-06-05 04:55:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9400921658986174) internal successors, (638), 217 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 638 transitions. [2021-06-05 04:55:40,959 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 638 transitions. Word has length 18 [2021-06-05 04:55:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:40,959 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 638 transitions. [2021-06-05 04:55:40,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 638 transitions. [2021-06-05 04:55:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:40,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:40,960 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:41,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:41,170 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:41,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1303812215, now seen corresponding path program 68 times [2021-06-05 04:55:41,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:41,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974225346] [2021-06-05 04:55:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:41,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:41,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974225346] [2021-06-05 04:55:41,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974225346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:41,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516290829] [2021-06-05 04:55:41,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:41,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:41,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516290829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:41,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:41,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:41,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24535988] [2021-06-05 04:55:41,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:41,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:41,324 INFO L87 Difference]: Start difference. First operand 218 states and 638 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:41,532 INFO L93 Difference]: Finished difference Result 526 states and 1428 transitions. [2021-06-05 04:55:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:41,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:41,533 INFO L225 Difference]: With dead ends: 526 [2021-06-05 04:55:41,533 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 04:55:41,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 04:55:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 222. [2021-06-05 04:55:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9592760180995477) internal successors, (654), 221 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 654 transitions. [2021-06-05 04:55:41,546 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 654 transitions. Word has length 18 [2021-06-05 04:55:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:41,546 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 654 transitions. [2021-06-05 04:55:41,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 654 transitions. [2021-06-05 04:55:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:41,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:41,547 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:41,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:41,757 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2060993905, now seen corresponding path program 69 times [2021-06-05 04:55:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:41,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805457202] [2021-06-05 04:55:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:41,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:41,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805457202] [2021-06-05 04:55:41,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805457202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:41,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848503298] [2021-06-05 04:55:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:41,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:41,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:41,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848503298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:41,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:41,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:41,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947126318] [2021-06-05 04:55:41,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:41,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:41,911 INFO L87 Difference]: Start difference. First operand 222 states and 654 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:42,121 INFO L93 Difference]: Finished difference Result 489 states and 1342 transitions. [2021-06-05 04:55:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:42,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:42,122 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:55:42,122 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 04:55:42,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 04:55:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 222. [2021-06-05 04:55:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9411764705882355) internal successors, (650), 221 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 650 transitions. [2021-06-05 04:55:42,125 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 650 transitions. Word has length 18 [2021-06-05 04:55:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:42,125 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 650 transitions. [2021-06-05 04:55:42,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 650 transitions. [2021-06-05 04:55:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:42,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:42,125 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:42,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:42,327 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:42,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1255509907, now seen corresponding path program 70 times [2021-06-05 04:55:42,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:42,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425478780] [2021-06-05 04:55:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:42,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:42,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425478780] [2021-06-05 04:55:42,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425478780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:42,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290324676] [2021-06-05 04:55:42,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:42,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:42,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290324676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:42,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:42,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272948677] [2021-06-05 04:55:42,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:42,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:42,507 INFO L87 Difference]: Start difference. First operand 222 states and 650 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:42,702 INFO L93 Difference]: Finished difference Result 452 states and 1260 transitions. [2021-06-05 04:55:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:42,702 INFO L225 Difference]: With dead ends: 452 [2021-06-05 04:55:42,702 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 04:55:42,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:55:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 04:55:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 217. [2021-06-05 04:55:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.949074074074074) internal successors, (637), 216 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 637 transitions. [2021-06-05 04:55:42,706 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 637 transitions. Word has length 18 [2021-06-05 04:55:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:42,706 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 637 transitions. [2021-06-05 04:55:42,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 637 transitions. [2021-06-05 04:55:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:42,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:42,706 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:42,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:42,916 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1030444307, now seen corresponding path program 71 times [2021-06-05 04:55:42,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:42,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787120564] [2021-06-05 04:55:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:42,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787120564] [2021-06-05 04:55:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787120564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978648452] [2021-06-05 04:55:42,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:42,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978648452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:43,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:43,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974434947] [2021-06-05 04:55:43,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:43,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:43,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:43,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:43,061 INFO L87 Difference]: Start difference. First operand 217 states and 637 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:43,201 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-06-05 04:55:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:43,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:43,202 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:55:43,202 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:55:43,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:55:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 221. [2021-06-05 04:55:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9863636363636363) internal successors, (657), 220 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 657 transitions. [2021-06-05 04:55:43,205 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 657 transitions. Word has length 18 [2021-06-05 04:55:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:43,205 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 657 transitions. [2021-06-05 04:55:43,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 657 transitions. [2021-06-05 04:55:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:43,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:43,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:43,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 04:55:43,406 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash -668276081, now seen corresponding path program 72 times [2021-06-05 04:55:43,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:43,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001896819] [2021-06-05 04:55:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:43,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001896819] [2021-06-05 04:55:43,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001896819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908610082] [2021-06-05 04:55:43,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:43,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:43,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:43,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908610082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:43,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961696125] [2021-06-05 04:55:43,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:43,551 INFO L87 Difference]: Start difference. First operand 221 states and 657 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:43,673 INFO L93 Difference]: Finished difference Result 404 states and 1161 transitions. [2021-06-05 04:55:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:43,673 INFO L225 Difference]: With dead ends: 404 [2021-06-05 04:55:43,673 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 04:55:43,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 04:55:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 213. [2021-06-05 04:55:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9292452830188678) internal successors, (621), 212 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 621 transitions. [2021-06-05 04:55:43,676 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 621 transitions. Word has length 18 [2021-06-05 04:55:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:43,676 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 621 transitions. [2021-06-05 04:55:43,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 621 transitions. [2021-06-05 04:55:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:43,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:43,677 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:43,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:43,877 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash -188192517, now seen corresponding path program 73 times [2021-06-05 04:55:43,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:43,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72292328] [2021-06-05 04:55:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:43,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:43,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72292328] [2021-06-05 04:55:43,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72292328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:43,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937680779] [2021-06-05 04:55:43,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:43,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:44,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937680779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:44,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:44,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:55:44,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076734639] [2021-06-05 04:55:44,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:44,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:44,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:44,030 INFO L87 Difference]: Start difference. First operand 213 states and 621 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:44,211 INFO L93 Difference]: Finished difference Result 502 states and 1407 transitions. [2021-06-05 04:55:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:44,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:44,213 INFO L225 Difference]: With dead ends: 502 [2021-06-05 04:55:44,213 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 04:55:44,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 04:55:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 219. [2021-06-05 04:55:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 04:55:44,216 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 18 [2021-06-05 04:55:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:44,216 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 04:55:44,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 04:55:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:44,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:44,216 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:44,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 04:55:44,417 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash 741968659, now seen corresponding path program 74 times [2021-06-05 04:55:44,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:44,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788002458] [2021-06-05 04:55:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:44,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:44,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788002458] [2021-06-05 04:55:44,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788002458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:44,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962142872] [2021-06-05 04:55:44,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:44,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:44,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962142872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:44,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:44,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:55:44,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832601897] [2021-06-05 04:55:44,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:44,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:44,566 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:44,739 INFO L93 Difference]: Finished difference Result 490 states and 1367 transitions. [2021-06-05 04:55:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:44,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:44,740 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:55:44,740 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 04:55:44,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 04:55:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 221. [2021-06-05 04:55:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.95) internal successors, (649), 220 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 649 transitions. [2021-06-05 04:55:44,743 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 649 transitions. Word has length 18 [2021-06-05 04:55:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:44,743 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 649 transitions. [2021-06-05 04:55:44,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 649 transitions. [2021-06-05 04:55:44,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:44,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:44,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:44,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:44,944 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:44,944 INFO L82 PathProgramCache]: Analyzing trace with hash 82317175, now seen corresponding path program 75 times [2021-06-05 04:55:44,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:44,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427742711] [2021-06-05 04:55:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:44,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:44,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427742711] [2021-06-05 04:55:44,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427742711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:44,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238282456] [2021-06-05 04:55:44,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:45,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:45,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:45,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:45,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238282456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:45,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:45,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:55:45,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356646248] [2021-06-05 04:55:45,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:55:45,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:45,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:55:45,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:45,117 INFO L87 Difference]: Start difference. First operand 221 states and 649 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:45,339 INFO L93 Difference]: Finished difference Result 505 states and 1410 transitions. [2021-06-05 04:55:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:45,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:45,340 INFO L225 Difference]: With dead ends: 505 [2021-06-05 04:55:45,340 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 04:55:45,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 04:55:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 218. [2021-06-05 04:55:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9769585253456223) internal successors, (646), 217 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 646 transitions. [2021-06-05 04:55:45,343 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 646 transitions. Word has length 18 [2021-06-05 04:55:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:45,343 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 646 transitions. [2021-06-05 04:55:45,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 646 transitions. [2021-06-05 04:55:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:45,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:45,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:45,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 04:55:45,544 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:45,544 INFO L82 PathProgramCache]: Analyzing trace with hash -98811273, now seen corresponding path program 76 times [2021-06-05 04:55:45,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:45,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625634765] [2021-06-05 04:55:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:45,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625634765] [2021-06-05 04:55:45,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625634765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:45,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769265191] [2021-06-05 04:55:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:55:45,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:45,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:45,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:45,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:45,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769265191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:45,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:45,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:45,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187407782] [2021-06-05 04:55:45,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:45,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:45,706 INFO L87 Difference]: Start difference. First operand 218 states and 646 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:45,827 INFO L93 Difference]: Finished difference Result 486 states and 1381 transitions. [2021-06-05 04:55:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:45,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:45,828 INFO L225 Difference]: With dead ends: 486 [2021-06-05 04:55:45,828 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 04:55:45,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 04:55:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 214. [2021-06-05 04:55:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9389671361502345) internal successors, (626), 213 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 626 transitions. [2021-06-05 04:55:45,832 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 626 transitions. Word has length 18 [2021-06-05 04:55:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:45,832 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 626 transitions. [2021-06-05 04:55:45,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 626 transitions. [2021-06-05 04:55:45,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:45,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:45,832 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:46,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 04:55:46,033 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1980104049, now seen corresponding path program 77 times [2021-06-05 04:55:46,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:46,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437692329] [2021-06-05 04:55:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:46,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:46,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437692329] [2021-06-05 04:55:46,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437692329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:46,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173575463] [2021-06-05 04:55:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:46,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:46,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:46,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:46,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173575463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:46,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:46,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:46,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578965015] [2021-06-05 04:55:46,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:46,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:46,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:46,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:46,186 INFO L87 Difference]: Start difference. First operand 214 states and 626 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:46,382 INFO L93 Difference]: Finished difference Result 443 states and 1246 transitions. [2021-06-05 04:55:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:46,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:46,383 INFO L225 Difference]: With dead ends: 443 [2021-06-05 04:55:46,383 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 04:55:46,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 04:55:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 222. [2021-06-05 04:55:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.932126696832579) internal successors, (648), 221 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 648 transitions. [2021-06-05 04:55:46,386 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 648 transitions. Word has length 18 [2021-06-05 04:55:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:46,386 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 648 transitions. [2021-06-05 04:55:46,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 648 transitions. [2021-06-05 04:55:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:46,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:46,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:46,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 04:55:46,587 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1001546605, now seen corresponding path program 78 times [2021-06-05 04:55:46,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:46,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218102466] [2021-06-05 04:55:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:46,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:46,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218102466] [2021-06-05 04:55:46,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218102466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:46,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109721385] [2021-06-05 04:55:46,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:46,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:46,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:46,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109721385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:46,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:46,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:46,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179475272] [2021-06-05 04:55:46,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:46,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:46,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:46,713 INFO L87 Difference]: Start difference. First operand 222 states and 648 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:46,883 INFO L93 Difference]: Finished difference Result 427 states and 1216 transitions. [2021-06-05 04:55:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:46,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:46,886 INFO L225 Difference]: With dead ends: 427 [2021-06-05 04:55:46,886 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 04:55:46,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 04:55:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 212. [2021-06-05 04:55:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-06-05 04:55:46,889 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-06-05 04:55:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:46,889 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-06-05 04:55:46,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-06-05 04:55:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:46,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:46,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:47,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 04:55:47,090 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:47,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2120551441, now seen corresponding path program 79 times [2021-06-05 04:55:47,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:47,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067353279] [2021-06-05 04:55:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:47,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067353279] [2021-06-05 04:55:47,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067353279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629097050] [2021-06-05 04:55:47,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:47,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629097050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:47,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:47,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 04:55:47,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222299199] [2021-06-05 04:55:47,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:47,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:47,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:47,238 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:47,493 INFO L93 Difference]: Finished difference Result 424 states and 1183 transitions. [2021-06-05 04:55:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:47,494 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:55:47,494 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 04:55:47,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:55:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 04:55:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 217. [2021-06-05 04:55:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.9444444444444446) internal successors, (636), 216 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 636 transitions. [2021-06-05 04:55:47,497 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 636 transitions. Word has length 18 [2021-06-05 04:55:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:47,497 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 636 transitions. [2021-06-05 04:55:47,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 636 transitions. [2021-06-05 04:55:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:47,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:47,497 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:47,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 04:55:47,698 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:47,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1190390265, now seen corresponding path program 80 times [2021-06-05 04:55:47,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:47,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414625988] [2021-06-05 04:55:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:47,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:47,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414625988] [2021-06-05 04:55:47,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414625988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:47,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082656067] [2021-06-05 04:55:47,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:47,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:47,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:47,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:47,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082656067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:47,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:47,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:47,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267749222] [2021-06-05 04:55:47,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:47,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:47,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:47,843 INFO L87 Difference]: Start difference. First operand 217 states and 636 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:48,090 INFO L93 Difference]: Finished difference Result 428 states and 1183 transitions. [2021-06-05 04:55:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:48,091 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:55:48,091 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 04:55:48,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 04:55:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 215. [2021-06-05 04:55:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.939252336448598) internal successors, (629), 214 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 629 transitions. [2021-06-05 04:55:48,094 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 629 transitions. Word has length 18 [2021-06-05 04:55:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:48,094 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 629 transitions. [2021-06-05 04:55:48,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 629 transitions. [2021-06-05 04:55:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:48,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:48,095 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:48,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:48,313 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:48,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2091884499, now seen corresponding path program 81 times [2021-06-05 04:55:48,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:48,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281056604] [2021-06-05 04:55:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:48,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:48,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281056604] [2021-06-05 04:55:48,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281056604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:48,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707836518] [2021-06-05 04:55:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:48,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:48,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:48,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:48,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707836518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:48,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:48,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:48,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219632564] [2021-06-05 04:55:48,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:48,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:48,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:48,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:48,443 INFO L87 Difference]: Start difference. First operand 215 states and 629 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:48,668 INFO L93 Difference]: Finished difference Result 422 states and 1164 transitions. [2021-06-05 04:55:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:48,669 INFO L225 Difference]: With dead ends: 422 [2021-06-05 04:55:48,669 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 04:55:48,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 04:55:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 213. [2021-06-05 04:55:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9339622641509435) internal successors, (622), 212 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-06-05 04:55:48,672 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-06-05 04:55:48,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:48,672 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-06-05 04:55:48,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-06-05 04:55:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:48,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:48,672 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:48,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 04:55:48,873 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1036814989, now seen corresponding path program 82 times [2021-06-05 04:55:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:48,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90251315] [2021-06-05 04:55:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:48,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:48,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90251315] [2021-06-05 04:55:48,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90251315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:48,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303920991] [2021-06-05 04:55:48,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:48,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303920991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:49,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:49,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 04:55:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846187551] [2021-06-05 04:55:49,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:55:49,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:49,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:55:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:49,012 INFO L87 Difference]: Start difference. First operand 213 states and 622 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:49,186 INFO L93 Difference]: Finished difference Result 441 states and 1207 transitions. [2021-06-05 04:55:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:49,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:49,187 INFO L225 Difference]: With dead ends: 441 [2021-06-05 04:55:49,187 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 04:55:49,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 04:55:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 219. [2021-06-05 04:55:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.977064220183486) internal successors, (649), 218 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 649 transitions. [2021-06-05 04:55:49,190 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 649 transitions. Word has length 18 [2021-06-05 04:55:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:49,190 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 649 transitions. [2021-06-05 04:55:49,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 649 transitions. [2021-06-05 04:55:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:49,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:49,190 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:49,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 04:55:49,400 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash -106653813, now seen corresponding path program 83 times [2021-06-05 04:55:49,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:49,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124728201] [2021-06-05 04:55:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:49,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:49,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124728201] [2021-06-05 04:55:49,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124728201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:49,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663603403] [2021-06-05 04:55:49,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:49,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:49,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:49,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:49,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663603403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:49,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:49,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:49,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925610560] [2021-06-05 04:55:49,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:49,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:49,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:49,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:49,557 INFO L87 Difference]: Start difference. First operand 219 states and 649 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:49,728 INFO L93 Difference]: Finished difference Result 445 states and 1207 transitions. [2021-06-05 04:55:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:49,729 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:55:49,729 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 04:55:49,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 04:55:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 221. [2021-06-05 04:55:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9545454545454546) internal successors, (650), 220 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 650 transitions. [2021-06-05 04:55:49,732 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 650 transitions. Word has length 18 [2021-06-05 04:55:49,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:49,732 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 650 transitions. [2021-06-05 04:55:49,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 650 transitions. [2021-06-05 04:55:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:49,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:49,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:49,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:49,933 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash -766305297, now seen corresponding path program 84 times [2021-06-05 04:55:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:49,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001619817] [2021-06-05 04:55:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:49,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:49,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001619817] [2021-06-05 04:55:49,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001619817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:49,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280969333] [2021-06-05 04:55:49,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:50,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:50,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:50,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280969333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:50,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:50,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:55:50,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148446286] [2021-06-05 04:55:50,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:55:50,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:50,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:55:50,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:50,090 INFO L87 Difference]: Start difference. First operand 221 states and 650 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:50,296 INFO L93 Difference]: Finished difference Result 414 states and 1142 transitions. [2021-06-05 04:55:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:50,297 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:55:50,297 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 04:55:50,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:55:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 04:55:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 218. [2021-06-05 04:55:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9815668202764978) internal successors, (647), 217 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 647 transitions. [2021-06-05 04:55:50,303 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 647 transitions. Word has length 18 [2021-06-05 04:55:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:50,303 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 647 transitions. [2021-06-05 04:55:50,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 647 transitions. [2021-06-05 04:55:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:50,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:50,303 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:50,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 04:55:50,503 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:50,504 INFO L82 PathProgramCache]: Analyzing trace with hash -947433745, now seen corresponding path program 85 times [2021-06-05 04:55:50,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:50,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450420714] [2021-06-05 04:55:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:50,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:50,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450420714] [2021-06-05 04:55:50,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450420714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:50,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984843847] [2021-06-05 04:55:50,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:50,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984843847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:50,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:50,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:50,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547929277] [2021-06-05 04:55:50,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:50,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:50,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:50,632 INFO L87 Difference]: Start difference. First operand 218 states and 647 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:50,763 INFO L93 Difference]: Finished difference Result 386 states and 1091 transitions. [2021-06-05 04:55:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:50,764 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:55:50,764 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:55:50,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:55:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 214. [2021-06-05 04:55:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.943661971830986) internal successors, (627), 213 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 627 transitions. [2021-06-05 04:55:50,767 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 627 transitions. Word has length 18 [2021-06-05 04:55:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:50,767 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 627 transitions. [2021-06-05 04:55:50,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 627 transitions. [2021-06-05 04:55:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:50,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:50,768 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:50,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:50,968 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1466240775, now seen corresponding path program 86 times [2021-06-05 04:55:50,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:50,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391301615] [2021-06-05 04:55:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:51,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:51,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391301615] [2021-06-05 04:55:51,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391301615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:51,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081618744] [2021-06-05 04:55:51,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:51,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:51,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:51,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:51,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081618744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:51,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:51,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:55:51,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713050562] [2021-06-05 04:55:51,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:55:51,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:51,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:55:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:51,148 INFO L87 Difference]: Start difference. First operand 214 states and 627 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:51,376 INFO L93 Difference]: Finished difference Result 422 states and 1166 transitions. [2021-06-05 04:55:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:51,377 INFO L225 Difference]: With dead ends: 422 [2021-06-05 04:55:51,377 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 04:55:51,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:55:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 04:55:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 222. [2021-06-05 04:55:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.936651583710407) internal successors, (649), 221 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 649 transitions. [2021-06-05 04:55:51,380 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 649 transitions. Word has length 18 [2021-06-05 04:55:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:51,380 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 649 transitions. [2021-06-05 04:55:51,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 649 transitions. [2021-06-05 04:55:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:51,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:51,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:51,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:51,581 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:51,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1850169077, now seen corresponding path program 87 times [2021-06-05 04:55:51,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:51,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566736177] [2021-06-05 04:55:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:51,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:51,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566736177] [2021-06-05 04:55:51,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566736177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:51,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595357907] [2021-06-05 04:55:51,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:51,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:51,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:51,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:51,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595357907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:51,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:51,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:51,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444952865] [2021-06-05 04:55:51,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:51,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:51,709 INFO L87 Difference]: Start difference. First operand 222 states and 649 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:51,876 INFO L93 Difference]: Finished difference Result 406 states and 1136 transitions. [2021-06-05 04:55:51,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:51,877 INFO L225 Difference]: With dead ends: 406 [2021-06-05 04:55:51,877 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 04:55:51,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 04:55:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 213. [2021-06-05 04:55:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9339622641509435) internal successors, (622), 212 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-06-05 04:55:51,880 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-06-05 04:55:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:51,880 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-06-05 04:55:51,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-06-05 04:55:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:51,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:51,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:52,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 04:55:52,081 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:52,081 INFO L82 PathProgramCache]: Analyzing trace with hash -687990825, now seen corresponding path program 88 times [2021-06-05 04:55:52,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:52,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728319112] [2021-06-05 04:55:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:52,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:52,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728319112] [2021-06-05 04:55:52,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728319112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:52,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935323416] [2021-06-05 04:55:52,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:52,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:52,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:52,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:52,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935323416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:52,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:52,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:55:52,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734539092] [2021-06-05 04:55:52,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:52,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:52,206 INFO L87 Difference]: Start difference. First operand 213 states and 622 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:52,404 INFO L93 Difference]: Finished difference Result 366 states and 1018 transitions. [2021-06-05 04:55:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:52,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:52,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:52,405 INFO L225 Difference]: With dead ends: 366 [2021-06-05 04:55:52,405 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 04:55:52,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 04:55:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 215. [2021-06-05 04:55:52,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.9299065420560746) internal successors, (627), 214 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 627 transitions. [2021-06-05 04:55:52,407 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 627 transitions. Word has length 18 [2021-06-05 04:55:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:52,407 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 627 transitions. [2021-06-05 04:55:52,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 627 transitions. [2021-06-05 04:55:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:52,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:52,408 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:52,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 04:55:52,609 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1068673581, now seen corresponding path program 89 times [2021-06-05 04:55:52,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:52,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091387700] [2021-06-05 04:55:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:52,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:52,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091387700] [2021-06-05 04:55:52,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091387700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:52,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267293386] [2021-06-05 04:55:52,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:52,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:52,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267293386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:52,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:52,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:52,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703292970] [2021-06-05 04:55:52,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:52,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:52,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:52,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:52,747 INFO L87 Difference]: Start difference. First operand 215 states and 627 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:52,944 INFO L93 Difference]: Finished difference Result 358 states and 1000 transitions. [2021-06-05 04:55:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:52,945 INFO L225 Difference]: With dead ends: 358 [2021-06-05 04:55:52,945 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 04:55:52,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 04:55:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 223. [2021-06-05 04:55:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.9234234234234235) internal successors, (649), 222 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 649 transitions. [2021-06-05 04:55:52,947 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 649 transitions. Word has length 18 [2021-06-05 04:55:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:52,947 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 649 transitions. [2021-06-05 04:55:52,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 649 transitions. [2021-06-05 04:55:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:55:52,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:52,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:53,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:53,148 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -90116137, now seen corresponding path program 90 times [2021-06-05 04:55:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:53,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562315581] [2021-06-05 04:55:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:53,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:53,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562315581] [2021-06-05 04:55:53,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562315581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:53,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593731482] [2021-06-05 04:55:53,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:53,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:53,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:53,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:55:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:53,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593731482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:53,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:53,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:55:53,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377358317] [2021-06-05 04:55:53,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:53,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:53,279 INFO L87 Difference]: Start difference. First operand 223 states and 649 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:53,472 INFO L93 Difference]: Finished difference Result 333 states and 948 transitions. [2021-06-05 04:55:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:55:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:55:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:53,472 INFO L225 Difference]: With dead ends: 333 [2021-06-05 04:55:53,472 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 04:55:53,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:55:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 04:55:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-06-05 04:55:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-06-05 04:55:53,475 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-06-05 04:55:53,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:53,475 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-06-05 04:55:53,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-06-05 04:55:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:53,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:53,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:53,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 04:55:53,676 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1714954922, now seen corresponding path program 1 times [2021-06-05 04:55:53,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:53,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379816029] [2021-06-05 04:55:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:53,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:53,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379816029] [2021-06-05 04:55:53,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379816029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:53,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377817747] [2021-06-05 04:55:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:53,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:53,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377817747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:53,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:53,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:55:53,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977130467] [2021-06-05 04:55:53,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:53,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:53,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:53,766 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:53,838 INFO L93 Difference]: Finished difference Result 306 states and 874 transitions. [2021-06-05 04:55:53,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:53,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:53,838 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:55:53,838 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 04:55:53,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 04:55:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 219. [2021-06-05 04:55:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.926605504587156) internal successors, (638), 218 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 638 transitions. [2021-06-05 04:55:53,841 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 638 transitions. Word has length 19 [2021-06-05 04:55:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:53,841 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 638 transitions. [2021-06-05 04:55:53,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 638 transitions. [2021-06-05 04:55:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:53,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:53,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:54,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:54,042 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1799002545, now seen corresponding path program 1 times [2021-06-05 04:55:54,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:54,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242303640] [2021-06-05 04:55:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:54,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:54,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242303640] [2021-06-05 04:55:54,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242303640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:54,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113637121] [2021-06-05 04:55:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113637121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:54,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:54,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:55:54,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244358411] [2021-06-05 04:55:54,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:55:54,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:54,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:55:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:55:54,132 INFO L87 Difference]: Start difference. First operand 219 states and 638 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:54,209 INFO L93 Difference]: Finished difference Result 359 states and 1037 transitions. [2021-06-05 04:55:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:54,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:54,210 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:55:54,210 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:55:54,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:55:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 230. [2021-06-05 04:55:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.978165938864629) internal successors, (682), 229 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 682 transitions. [2021-06-05 04:55:54,213 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 682 transitions. Word has length 19 [2021-06-05 04:55:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:54,216 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 682 transitions. [2021-06-05 04:55:54,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 682 transitions. [2021-06-05 04:55:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:54,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:54,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:54,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 04:55:54,433 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:54,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2143819529, now seen corresponding path program 2 times [2021-06-05 04:55:54,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:54,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020406664] [2021-06-05 04:55:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:54,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020406664] [2021-06-05 04:55:54,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020406664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769239796] [2021-06-05 04:55:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:54,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:54,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:54,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769239796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:54,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:54,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:55:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022224415] [2021-06-05 04:55:54,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:54,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:54,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:54,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:54,523 INFO L87 Difference]: Start difference. First operand 230 states and 682 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:54,603 INFO L93 Difference]: Finished difference Result 371 states and 1061 transitions. [2021-06-05 04:55:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:54,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:54,604 INFO L225 Difference]: With dead ends: 371 [2021-06-05 04:55:54,604 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 04:55:54,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 04:55:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 246. [2021-06-05 04:55:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-06-05 04:55:54,607 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-06-05 04:55:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:54,607 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-06-05 04:55:54,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-06-05 04:55:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:54,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:54,608 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:54,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 04:55:54,808 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2111872576, now seen corresponding path program 2 times [2021-06-05 04:55:54,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:54,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987907894] [2021-06-05 04:55:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:54,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:54,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987907894] [2021-06-05 04:55:54,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987907894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:54,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571921792] [2021-06-05 04:55:54,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:54,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:54,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571921792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:54,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:54,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:55:54,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572435551] [2021-06-05 04:55:54,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:54,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:54,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:54,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:54,918 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:54,995 INFO L93 Difference]: Finished difference Result 360 states and 1044 transitions. [2021-06-05 04:55:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:54,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:54,996 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:55:54,996 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 04:55:54,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 04:55:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 250. [2021-06-05 04:55:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0281124497991967) internal successors, (754), 249 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 754 transitions. [2021-06-05 04:55:54,999 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 754 transitions. Word has length 19 [2021-06-05 04:55:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:54,999 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 754 transitions. [2021-06-05 04:55:54,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 754 transitions. [2021-06-05 04:55:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:54,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:55,000 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:55,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 04:55:55,205 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash 311126640, now seen corresponding path program 3 times [2021-06-05 04:55:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:55,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894944238] [2021-06-05 04:55:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:55,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894944238] [2021-06-05 04:55:55,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894944238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833531247] [2021-06-05 04:55:55,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:55,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:55,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:55,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:55,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:55,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833531247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:55,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:55,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:55:55,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919081747] [2021-06-05 04:55:55,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:55,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:55,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:55,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:55,323 INFO L87 Difference]: Start difference. First operand 250 states and 754 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:55,402 INFO L93 Difference]: Finished difference Result 330 states and 966 transitions. [2021-06-05 04:55:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:55,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:55,403 INFO L225 Difference]: With dead ends: 330 [2021-06-05 04:55:55,403 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 04:55:55,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 04:55:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 250. [2021-06-05 04:55:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0120481927710845) internal successors, (750), 249 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 750 transitions. [2021-06-05 04:55:55,406 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 750 transitions. Word has length 19 [2021-06-05 04:55:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:55,406 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 750 transitions. [2021-06-05 04:55:55,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 750 transitions. [2021-06-05 04:55:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:55,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:55,406 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:55,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-05 04:55:55,607 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:55,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1664534853, now seen corresponding path program 3 times [2021-06-05 04:55:55,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:55,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464888222] [2021-06-05 04:55:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:55,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464888222] [2021-06-05 04:55:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464888222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:55,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282990186] [2021-06-05 04:55:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:55,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:55,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:55,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282990186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:55,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:55,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:55:55,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549836565] [2021-06-05 04:55:55,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:55,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:55,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:55,700 INFO L87 Difference]: Start difference. First operand 250 states and 750 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:55,784 INFO L93 Difference]: Finished difference Result 351 states and 1024 transitions. [2021-06-05 04:55:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:55,785 INFO L225 Difference]: With dead ends: 351 [2021-06-05 04:55:55,785 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 04:55:55,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 04:55:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2021-06-05 04:55:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.9957805907172994) internal successors, (710), 237 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-06-05 04:55:55,788 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 19 [2021-06-05 04:55:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:55,788 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-06-05 04:55:55,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-06-05 04:55:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:55,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:55,788 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:55,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:55,989 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:55,989 INFO L82 PathProgramCache]: Analyzing trace with hash -757034203, now seen corresponding path program 4 times [2021-06-05 04:55:55,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:55,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835937512] [2021-06-05 04:55:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835937512] [2021-06-05 04:55:56,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835937512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483789649] [2021-06-05 04:55:56,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:56,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:56,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:56,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:56,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483789649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:56,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:55:56,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079005147] [2021-06-05 04:55:56,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:56,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:56,082 INFO L87 Difference]: Start difference. First operand 238 states and 710 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:56,161 INFO L93 Difference]: Finished difference Result 321 states and 937 transitions. [2021-06-05 04:55:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:56,161 INFO L225 Difference]: With dead ends: 321 [2021-06-05 04:55:56,161 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 04:55:56,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 04:55:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 242. [2021-06-05 04:55:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.995850622406639) internal successors, (722), 241 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 722 transitions. [2021-06-05 04:55:56,164 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 722 transitions. Word has length 19 [2021-06-05 04:55:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:56,164 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 722 transitions. [2021-06-05 04:55:56,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 722 transitions. [2021-06-05 04:55:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:56,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:56,165 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:56,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:56,373 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:56,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1495725994, now seen corresponding path program 4 times [2021-06-05 04:55:56,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:56,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885515097] [2021-06-05 04:55:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:56,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885515097] [2021-06-05 04:55:56,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885515097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915024067] [2021-06-05 04:55:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:56,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:55:56,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915024067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:56,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:55:56,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949856997] [2021-06-05 04:55:56,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:55:56,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:56,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:55:56,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:55:56,473 INFO L87 Difference]: Start difference. First operand 242 states and 722 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:56,554 INFO L93 Difference]: Finished difference Result 379 states and 1110 transitions. [2021-06-05 04:55:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:56,555 INFO L225 Difference]: With dead ends: 379 [2021-06-05 04:55:56,555 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 04:55:56,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 04:55:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 246. [2021-06-05 04:55:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-06-05 04:55:56,558 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-06-05 04:55:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:56,558 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-06-05 04:55:56,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-06-05 04:55:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:56,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:56,559 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:56,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 04:55:56,759 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:56,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1556074207, now seen corresponding path program 5 times [2021-06-05 04:55:56,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:56,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855866368] [2021-06-05 04:55:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:56,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855866368] [2021-06-05 04:55:56,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855866368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966329574] [2021-06-05 04:55:56,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:56,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:56,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:56,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966329574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:56,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:56,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:55:56,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285251752] [2021-06-05 04:55:56,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:56,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:56,877 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:56,952 INFO L93 Difference]: Finished difference Result 372 states and 1080 transitions. [2021-06-05 04:55:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:56,952 INFO L225 Difference]: With dead ends: 372 [2021-06-05 04:55:56,953 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 04:55:56,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 04:55:56,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 262. [2021-06-05 04:55:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0421455938697317) internal successors, (794), 261 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-06-05 04:55:56,956 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-06-05 04:55:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:56,956 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-06-05 04:55:56,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-06-05 04:55:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:56,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:56,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:57,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 04:55:57,157 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1524127254, now seen corresponding path program 5 times [2021-06-05 04:55:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:57,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249765996] [2021-06-05 04:55:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249765996] [2021-06-05 04:55:57,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249765996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:57,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865269250] [2021-06-05 04:55:57,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:57,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:57,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:57,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865269250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:57,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:57,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:55:57,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157589571] [2021-06-05 04:55:57,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:57,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:57,251 INFO L87 Difference]: Start difference. First operand 262 states and 794 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:57,341 INFO L93 Difference]: Finished difference Result 408 states and 1192 transitions. [2021-06-05 04:55:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:57,341 INFO L225 Difference]: With dead ends: 408 [2021-06-05 04:55:57,341 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 04:55:57,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 04:55:57,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 262. [2021-06-05 04:55:57,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0421455938697317) internal successors, (794), 261 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-06-05 04:55:57,345 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-06-05 04:55:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:57,345 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-06-05 04:55:57,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-06-05 04:55:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:57,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:57,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:57,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 04:55:57,546 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:57,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash 898871962, now seen corresponding path program 6 times [2021-06-05 04:55:57,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:57,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786699257] [2021-06-05 04:55:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:57,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:57,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786699257] [2021-06-05 04:55:57,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786699257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:57,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102188351] [2021-06-05 04:55:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:57,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:57,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102188351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:55:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402427223] [2021-06-05 04:55:57,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:57,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:57,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:57,661 INFO L87 Difference]: Start difference. First operand 262 states and 794 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:57,736 INFO L93 Difference]: Finished difference Result 354 states and 1042 transitions. [2021-06-05 04:55:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:57,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:57,737 INFO L225 Difference]: With dead ends: 354 [2021-06-05 04:55:57,737 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 04:55:57,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 04:55:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 262. [2021-06-05 04:55:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0268199233716473) internal successors, (790), 261 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 790 transitions. [2021-06-05 04:55:57,740 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 790 transitions. Word has length 19 [2021-06-05 04:55:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:57,740 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 790 transitions. [2021-06-05 04:55:57,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 790 transitions. [2021-06-05 04:55:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:57,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:57,741 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:57,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:57,941 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1076789531, now seen corresponding path program 6 times [2021-06-05 04:55:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:57,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551559724] [2021-06-05 04:55:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:57,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:57,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551559724] [2021-06-05 04:55:57,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551559724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:57,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350466720] [2021-06-05 04:55:57,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:57,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:55:57,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:57,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350466720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:58,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:55:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303725745] [2021-06-05 04:55:58,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:58,046 INFO L87 Difference]: Start difference. First operand 262 states and 790 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:58,133 INFO L93 Difference]: Finished difference Result 326 states and 967 transitions. [2021-06-05 04:55:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:58,134 INFO L225 Difference]: With dead ends: 326 [2021-06-05 04:55:58,134 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 04:55:58,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 04:55:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2021-06-05 04:55:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-06-05 04:55:58,137 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-06-05 04:55:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:58,137 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-06-05 04:55:58,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-06-05 04:55:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:58,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:58,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:58,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-06-05 04:55:58,345 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 132155580, now seen corresponding path program 7 times [2021-06-05 04:55:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:58,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229787991] [2021-06-05 04:55:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229787991] [2021-06-05 04:55:58,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229787991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705284158] [2021-06-05 04:55:58,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:58,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:58,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705284158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:58,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:55:58,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113871640] [2021-06-05 04:55:58,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:55:58,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:55:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:55:58,453 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:58,529 INFO L93 Difference]: Finished difference Result 492 states and 1411 transitions. [2021-06-05 04:55:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:58,530 INFO L225 Difference]: With dead ends: 492 [2021-06-05 04:55:58,530 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 04:55:58,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:55:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 04:55:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-06-05 04:55:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0196850393700787) internal successors, (767), 254 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 767 transitions. [2021-06-05 04:55:58,534 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 767 transitions. Word has length 19 [2021-06-05 04:55:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:58,534 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 767 transitions. [2021-06-05 04:55:58,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 767 transitions. [2021-06-05 04:55:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:58,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:58,534 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:58,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:58,735 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash 48107957, now seen corresponding path program 7 times [2021-06-05 04:55:58,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:58,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733495595] [2021-06-05 04:55:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:58,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733495595] [2021-06-05 04:55:58,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733495595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815339288] [2021-06-05 04:55:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:58,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815339288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:58,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:58,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:55:58,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247750561] [2021-06-05 04:55:58,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:55:58,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:58,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:55:58,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:55:58,826 INFO L87 Difference]: Start difference. First operand 255 states and 767 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:58,907 INFO L93 Difference]: Finished difference Result 608 states and 1788 transitions. [2021-06-05 04:55:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:58,908 INFO L225 Difference]: With dead ends: 608 [2021-06-05 04:55:58,908 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 04:55:58,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 04:55:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 264. [2021-06-05 04:55:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.053231939163498) internal successors, (803), 263 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 803 transitions. [2021-06-05 04:55:58,911 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 803 transitions. Word has length 19 [2021-06-05 04:55:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:58,911 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 803 transitions. [2021-06-05 04:55:58,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 803 transitions. [2021-06-05 04:55:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:58,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:58,912 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:59,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:59,112 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:59,113 INFO L82 PathProgramCache]: Analyzing trace with hash -296709027, now seen corresponding path program 8 times [2021-06-05 04:55:59,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:59,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842011920] [2021-06-05 04:55:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:59,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:59,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842011920] [2021-06-05 04:55:59,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842011920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:59,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360282396] [2021-06-05 04:55:59,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:59,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360282396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:55:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426586345] [2021-06-05 04:55:59,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:55:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:55:59,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:55:59,212 INFO L87 Difference]: Start difference. First operand 264 states and 803 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:59,290 INFO L93 Difference]: Finished difference Result 554 states and 1618 transitions. [2021-06-05 04:55:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:59,291 INFO L225 Difference]: With dead ends: 554 [2021-06-05 04:55:59,291 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 04:55:59,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:55:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 04:55:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 280. [2021-06-05 04:55:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-06-05 04:55:59,295 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-06-05 04:55:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:59,295 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-06-05 04:55:59,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-06-05 04:55:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:59,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:59,295 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:59,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:59,511 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -264762074, now seen corresponding path program 8 times [2021-06-05 04:55:59,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:59,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049083399] [2021-06-05 04:55:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:59,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049083399] [2021-06-05 04:55:59,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049083399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922682078] [2021-06-05 04:55:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:59,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:55:59,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:55:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:59,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922682078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:59,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:55:59,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:55:59,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799834633] [2021-06-05 04:55:59,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:55:59,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:55:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:55:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:55:59,627 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:55:59,716 INFO L93 Difference]: Finished difference Result 521 states and 1530 transitions. [2021-06-05 04:55:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:55:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:55:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:55:59,717 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:55:59,717 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:55:59,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:55:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:55:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 280. [2021-06-05 04:55:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-06-05 04:55:59,721 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-06-05 04:55:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:55:59,721 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-06-05 04:55:59,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:55:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-06-05 04:55:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:55:59,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:55:59,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:55:59,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 04:55:59,921 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:55:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:55:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2136730154, now seen corresponding path program 9 times [2021-06-05 04:55:59,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:55:59,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018600913] [2021-06-05 04:55:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:55:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:55:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:55:59,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:55:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018600913] [2021-06-05 04:55:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018600913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:55:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319297685] [2021-06-05 04:55:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:55:59,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:55:59,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:55:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:55:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319297685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:00,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:00,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:00,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173344136] [2021-06-05 04:56:00,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:00,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:00,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:00,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:00,032 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:00,130 INFO L93 Difference]: Finished difference Result 518 states and 1507 transitions. [2021-06-05 04:56:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:00,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:00,131 INFO L225 Difference]: With dead ends: 518 [2021-06-05 04:56:00,131 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 04:56:00,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 04:56:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 280. [2021-06-05 04:56:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.064516129032258) internal successors, (855), 279 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 855 transitions. [2021-06-05 04:56:00,134 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 855 transitions. Word has length 19 [2021-06-05 04:56:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:00,134 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 855 transitions. [2021-06-05 04:56:00,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 855 transitions. [2021-06-05 04:56:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:00,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:00,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:00,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:00,341 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:00,341 INFO L82 PathProgramCache]: Analyzing trace with hash 182575649, now seen corresponding path program 9 times [2021-06-05 04:56:00,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:00,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815023638] [2021-06-05 04:56:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:00,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815023638] [2021-06-05 04:56:00,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815023638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:00,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909587365] [2021-06-05 04:56:00,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:00,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:00,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:00,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909587365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:00,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:00,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:00,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242536487] [2021-06-05 04:56:00,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:00,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:00,434 INFO L87 Difference]: Start difference. First operand 280 states and 855 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:00,511 INFO L93 Difference]: Finished difference Result 572 states and 1674 transitions. [2021-06-05 04:56:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:00,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:00,512 INFO L225 Difference]: With dead ends: 572 [2021-06-05 04:56:00,512 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 04:56:00,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 04:56:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 269. [2021-06-05 04:56:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0671641791044775) internal successors, (822), 268 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 822 transitions. [2021-06-05 04:56:00,516 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 822 transitions. Word has length 19 [2021-06-05 04:56:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:00,516 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 822 transitions. [2021-06-05 04:56:00,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 822 transitions. [2021-06-05 04:56:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:00,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:00,516 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:00,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:00,717 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:00,717 INFO L82 PathProgramCache]: Analyzing trace with hash -12394796, now seen corresponding path program 10 times [2021-06-05 04:56:00,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:00,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439436641] [2021-06-05 04:56:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:00,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439436641] [2021-06-05 04:56:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439436641] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:00,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:00,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:00,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121342613] [2021-06-05 04:56:00,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:00,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:00,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:00,741 INFO L87 Difference]: Start difference. First operand 269 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:00,825 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-06-05 04:56:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:00,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:00,826 INFO L225 Difference]: With dead ends: 413 [2021-06-05 04:56:00,826 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 04:56:00,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 04:56:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 273. [2021-06-05 04:56:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0441176470588234) internal successors, (828), 272 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 828 transitions. [2021-06-05 04:56:00,829 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 828 transitions. Word has length 19 [2021-06-05 04:56:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:00,829 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 828 transitions. [2021-06-05 04:56:00,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 828 transitions. [2021-06-05 04:56:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:00,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:00,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:00,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2021-06-05 04:56:00,830 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1941255398, now seen corresponding path program 11 times [2021-06-05 04:56:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:00,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807098381] [2021-06-05 04:56:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:00,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807098381] [2021-06-05 04:56:00,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807098381] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:00,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:00,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:00,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369620967] [2021-06-05 04:56:00,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:00,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:00,856 INFO L87 Difference]: Start difference. First operand 273 states and 828 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:00,946 INFO L93 Difference]: Finished difference Result 397 states and 1148 transitions. [2021-06-05 04:56:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:00,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:00,947 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:56:00,947 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:56:00,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:56:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2021-06-05 04:56:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.024822695035461) internal successors, (853), 282 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 853 transitions. [2021-06-05 04:56:00,950 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 853 transitions. Word has length 19 [2021-06-05 04:56:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:00,951 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 853 transitions. [2021-06-05 04:56:00,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 853 transitions. [2021-06-05 04:56:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:00,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:00,951 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:00,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2021-06-05 04:56:00,951 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:00,951 INFO L82 PathProgramCache]: Analyzing trace with hash -449594866, now seen corresponding path program 12 times [2021-06-05 04:56:00,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:00,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684465078] [2021-06-05 04:56:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:00,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684465078] [2021-06-05 04:56:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684465078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:00,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:00,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:00,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857097124] [2021-06-05 04:56:00,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:00,977 INFO L87 Difference]: Start difference. First operand 283 states and 853 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:01,075 INFO L93 Difference]: Finished difference Result 361 states and 1065 transitions. [2021-06-05 04:56:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:01,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:01,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:01,076 INFO L225 Difference]: With dead ends: 361 [2021-06-05 04:56:01,076 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 04:56:01,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 04:56:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2021-06-05 04:56:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0597014925373136) internal successors, (820), 268 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 820 transitions. [2021-06-05 04:56:01,079 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 820 transitions. Word has length 19 [2021-06-05 04:56:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:01,079 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 820 transitions. [2021-06-05 04:56:01,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 820 transitions. [2021-06-05 04:56:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:01,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:01,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:01,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2021-06-05 04:56:01,080 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash -405487539, now seen corresponding path program 10 times [2021-06-05 04:56:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:01,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55962852] [2021-06-05 04:56:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:01,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55962852] [2021-06-05 04:56:01,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55962852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370077745] [2021-06-05 04:56:01,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:01,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:01,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:01,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370077745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:01,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:01,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533981694] [2021-06-05 04:56:01,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:01,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:01,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:01,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:01,172 INFO L87 Difference]: Start difference. First operand 269 states and 820 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:01,250 INFO L93 Difference]: Finished difference Result 531 states and 1547 transitions. [2021-06-05 04:56:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:01,251 INFO L225 Difference]: With dead ends: 531 [2021-06-05 04:56:01,251 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 04:56:01,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 04:56:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 254. [2021-06-05 04:56:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.0118577075098814) internal successors, (762), 253 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 762 transitions. [2021-06-05 04:56:01,255 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 762 transitions. Word has length 19 [2021-06-05 04:56:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:01,255 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 762 transitions. [2021-06-05 04:56:01,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 762 transitions. [2021-06-05 04:56:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:01,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:01,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:01,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 04:56:01,456 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1305660447, now seen corresponding path program 11 times [2021-06-05 04:56:01,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:01,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950300520] [2021-06-05 04:56:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:01,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950300520] [2021-06-05 04:56:01,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950300520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692556844] [2021-06-05 04:56:01,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:01,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:01,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692556844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:01,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516940943] [2021-06-05 04:56:01,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:01,550 INFO L87 Difference]: Start difference. First operand 254 states and 762 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:01,625 INFO L93 Difference]: Finished difference Result 470 states and 1356 transitions. [2021-06-05 04:56:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:01,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:01,626 INFO L225 Difference]: With dead ends: 470 [2021-06-05 04:56:01,626 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 04:56:01,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 04:56:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 266. [2021-06-05 04:56:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0226415094339623) internal successors, (801), 265 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 801 transitions. [2021-06-05 04:56:01,629 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 801 transitions. Word has length 19 [2021-06-05 04:56:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:01,629 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 801 transitions. [2021-06-05 04:56:01,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 801 transitions. [2021-06-05 04:56:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:01,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:01,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:01,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:01,830 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:01,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:01,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1773947229, now seen corresponding path program 12 times [2021-06-05 04:56:01,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:01,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296203778] [2021-06-05 04:56:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:01,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296203778] [2021-06-05 04:56:01,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296203778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732385501] [2021-06-05 04:56:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:01,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:01,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:01,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:01,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732385501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:01,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:01,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:01,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972314088] [2021-06-05 04:56:01,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:01,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:01,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:01,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:01,927 INFO L87 Difference]: Start difference. First operand 266 states and 801 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:02,003 INFO L93 Difference]: Finished difference Result 448 states and 1309 transitions. [2021-06-05 04:56:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:02,004 INFO L225 Difference]: With dead ends: 448 [2021-06-05 04:56:02,004 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 04:56:02,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 04:56:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 251. [2021-06-05 04:56:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 3.024) internal successors, (756), 250 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 756 transitions. [2021-06-05 04:56:02,007 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 756 transitions. Word has length 19 [2021-06-05 04:56:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:02,008 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 756 transitions. [2021-06-05 04:56:02,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 756 transitions. [2021-06-05 04:56:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:02,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:02,008 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:02,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:02,208 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash -964970507, now seen corresponding path program 13 times [2021-06-05 04:56:02,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:02,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630222252] [2021-06-05 04:56:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630222252] [2021-06-05 04:56:02,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630222252] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:02,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:02,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:02,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293855838] [2021-06-05 04:56:02,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:02,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:02,234 INFO L87 Difference]: Start difference. First operand 251 states and 756 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:02,302 INFO L93 Difference]: Finished difference Result 469 states and 1343 transitions. [2021-06-05 04:56:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:02,303 INFO L225 Difference]: With dead ends: 469 [2021-06-05 04:56:02,303 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 04:56:02,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 04:56:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 271. [2021-06-05 04:56:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0444444444444443) internal successors, (822), 270 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 822 transitions. [2021-06-05 04:56:02,307 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 822 transitions. Word has length 19 [2021-06-05 04:56:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:02,307 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 822 transitions. [2021-06-05 04:56:02,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 822 transitions. [2021-06-05 04:56:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:02,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:02,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:02,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2021-06-05 04:56:02,307 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash -584232867, now seen corresponding path program 14 times [2021-06-05 04:56:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:02,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998852858] [2021-06-05 04:56:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:02,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998852858] [2021-06-05 04:56:02,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998852858] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:02,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:02,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:02,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749633133] [2021-06-05 04:56:02,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:02,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:02,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:02,338 INFO L87 Difference]: Start difference. First operand 271 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:02,406 INFO L93 Difference]: Finished difference Result 475 states and 1358 transitions. [2021-06-05 04:56:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:02,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:02,407 INFO L225 Difference]: With dead ends: 475 [2021-06-05 04:56:02,407 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 04:56:02,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 04:56:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 275. [2021-06-05 04:56:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0328467153284673) internal successors, (831), 274 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 831 transitions. [2021-06-05 04:56:02,410 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 831 transitions. Word has length 19 [2021-06-05 04:56:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:02,410 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 831 transitions. [2021-06-05 04:56:02,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 831 transitions. [2021-06-05 04:56:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:02,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:02,411 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:02,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2021-06-05 04:56:02,411 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash 967392422, now seen corresponding path program 13 times [2021-06-05 04:56:02,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:02,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445206381] [2021-06-05 04:56:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:02,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445206381] [2021-06-05 04:56:02,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445206381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:02,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503865306] [2021-06-05 04:56:02,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503865306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:02,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:02,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:02,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770743225] [2021-06-05 04:56:02,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:02,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:02,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:02,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:02,541 INFO L87 Difference]: Start difference. First operand 275 states and 831 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:02,619 INFO L93 Difference]: Finished difference Result 493 states and 1439 transitions. [2021-06-05 04:56:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:02,620 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:56:02,620 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 04:56:02,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 04:56:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 281. [2021-06-05 04:56:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0642857142857145) internal successors, (858), 280 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 858 transitions. [2021-06-05 04:56:02,624 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 858 transitions. Word has length 19 [2021-06-05 04:56:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:02,624 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 858 transitions. [2021-06-05 04:56:02,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 858 transitions. [2021-06-05 04:56:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:02,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:02,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:02,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-05 04:56:02,825 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1897553598, now seen corresponding path program 14 times [2021-06-05 04:56:02,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:02,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950880127] [2021-06-05 04:56:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:02,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950880127] [2021-06-05 04:56:02,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950880127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:02,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491081824] [2021-06-05 04:56:02,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:02,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:02,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491081824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:02,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:02,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475937896] [2021-06-05 04:56:02,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:02,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:02,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:02,937 INFO L87 Difference]: Start difference. First operand 281 states and 858 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:03,006 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-06-05 04:56:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:03,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:03,007 INFO L225 Difference]: With dead ends: 475 [2021-06-05 04:56:03,007 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 04:56:03,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 04:56:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 281. [2021-06-05 04:56:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0607142857142855) internal successors, (857), 280 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-06-05 04:56:03,011 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-06-05 04:56:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:03,011 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-06-05 04:56:03,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-06-05 04:56:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:03,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:03,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:03,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:03,211 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1169104647, now seen corresponding path program 15 times [2021-06-05 04:56:03,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:03,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424897120] [2021-06-05 04:56:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:03,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424897120] [2021-06-05 04:56:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424897120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391588466] [2021-06-05 04:56:03,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:03,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:03,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:03,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:03,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391588466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:03,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:03,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:03,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043922742] [2021-06-05 04:56:03,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:03,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:03,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:03,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:03,312 INFO L87 Difference]: Start difference. First operand 281 states and 857 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:03,395 INFO L93 Difference]: Finished difference Result 494 states and 1409 transitions. [2021-06-05 04:56:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:03,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:03,396 INFO L225 Difference]: With dead ends: 494 [2021-06-05 04:56:03,396 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 04:56:03,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 04:56:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 281. [2021-06-05 04:56:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0714285714285716) internal successors, (860), 280 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-06-05 04:56:03,400 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-06-05 04:56:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:03,400 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-06-05 04:56:03,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-06-05 04:56:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:03,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:03,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:03,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 04:56:03,601 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:03,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1167792078, now seen corresponding path program 15 times [2021-06-05 04:56:03,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:03,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66267271] [2021-06-05 04:56:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:03,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:03,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66267271] [2021-06-05 04:56:03,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66267271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:03,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212572270] [2021-06-05 04:56:03,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:03,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:56:03,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:03,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212572270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:03,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:03,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:03,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390853448] [2021-06-05 04:56:03,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:03,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:03,723 INFO L87 Difference]: Start difference. First operand 281 states and 860 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:03,819 INFO L93 Difference]: Finished difference Result 484 states and 1404 transitions. [2021-06-05 04:56:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:03,820 INFO L225 Difference]: With dead ends: 484 [2021-06-05 04:56:03,820 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 04:56:03,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 04:56:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 272. [2021-06-05 04:56:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.062730627306273) internal successors, (830), 271 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-06-05 04:56:03,824 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-06-05 04:56:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:03,824 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-06-05 04:56:03,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-06-05 04:56:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:03,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:03,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:04,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 04:56:04,025 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1086551406, now seen corresponding path program 16 times [2021-06-05 04:56:04,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:04,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430883433] [2021-06-05 04:56:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:04,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430883433] [2021-06-05 04:56:04,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430883433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:04,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120761015] [2021-06-05 04:56:04,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:04,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:04,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:04,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120761015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:04,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:04,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:04,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985476677] [2021-06-05 04:56:04,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:04,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:04,138 INFO L87 Difference]: Start difference. First operand 272 states and 830 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:04,208 INFO L93 Difference]: Finished difference Result 439 states and 1276 transitions. [2021-06-05 04:56:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:04,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:04,209 INFO L225 Difference]: With dead ends: 439 [2021-06-05 04:56:04,209 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 04:56:04,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 04:56:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 272. [2021-06-05 04:56:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.047970479704797) internal successors, (826), 271 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-06-05 04:56:04,212 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-06-05 04:56:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:04,212 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-06-05 04:56:04,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-06-05 04:56:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:04,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:04,213 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:04,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 04:56:04,413 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -889110087, now seen corresponding path program 16 times [2021-06-05 04:56:04,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:04,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90878632] [2021-06-05 04:56:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:04,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90878632] [2021-06-05 04:56:04,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90878632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:04,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382130040] [2021-06-05 04:56:04,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:04,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:04,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382130040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:04,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:04,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239579638] [2021-06-05 04:56:04,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:04,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:04,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:04,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:04,521 INFO L87 Difference]: Start difference. First operand 272 states and 826 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:04,603 INFO L93 Difference]: Finished difference Result 466 states and 1359 transitions. [2021-06-05 04:56:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:04,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:04,604 INFO L225 Difference]: With dead ends: 466 [2021-06-05 04:56:04,604 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 04:56:04,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 04:56:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 268. [2021-06-05 04:56:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.048689138576779) internal successors, (814), 267 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 814 transitions. [2021-06-05 04:56:04,607 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 814 transitions. Word has length 19 [2021-06-05 04:56:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:04,607 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 814 transitions. [2021-06-05 04:56:04,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 814 transitions. [2021-06-05 04:56:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:04,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:04,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:04,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:04,808 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:04,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1710395246, now seen corresponding path program 17 times [2021-06-05 04:56:04,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:04,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158362643] [2021-06-05 04:56:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:04,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158362643] [2021-06-05 04:56:04,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158362643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:04,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:04,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:04,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703201916] [2021-06-05 04:56:04,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:04,835 INFO L87 Difference]: Start difference. First operand 268 states and 814 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:04,929 INFO L93 Difference]: Finished difference Result 410 states and 1187 transitions. [2021-06-05 04:56:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:04,930 INFO L225 Difference]: With dead ends: 410 [2021-06-05 04:56:04,930 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 04:56:04,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 04:56:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2021-06-05 04:56:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0288808664259927) internal successors, (839), 277 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 839 transitions. [2021-06-05 04:56:04,933 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 839 transitions. Word has length 19 [2021-06-05 04:56:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:04,933 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 839 transitions. [2021-06-05 04:56:04,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 839 transitions. [2021-06-05 04:56:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:04,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:04,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:04,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2021-06-05 04:56:04,934 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:04,934 INFO L82 PathProgramCache]: Analyzing trace with hash 608481094, now seen corresponding path program 18 times [2021-06-05 04:56:04,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:04,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273564923] [2021-06-05 04:56:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:04,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:04,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273564923] [2021-06-05 04:56:04,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273564923] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:04,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:04,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:04,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262433909] [2021-06-05 04:56:04,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:04,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:04,961 INFO L87 Difference]: Start difference. First operand 278 states and 839 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,047 INFO L93 Difference]: Finished difference Result 374 states and 1104 transitions. [2021-06-05 04:56:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,048 INFO L225 Difference]: With dead ends: 374 [2021-06-05 04:56:05,048 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 04:56:05,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 04:56:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 268. [2021-06-05 04:56:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.044943820224719) internal successors, (813), 267 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 813 transitions. [2021-06-05 04:56:05,051 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 813 transitions. Word has length 19 [2021-06-05 04:56:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,051 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 813 transitions. [2021-06-05 04:56:05,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 813 transitions. [2021-06-05 04:56:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:05,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,051 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:05,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2021-06-05 04:56:05,052 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:05,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1860559839, now seen corresponding path program 17 times [2021-06-05 04:56:05,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:05,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786870188] [2021-06-05 04:56:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:05,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786870188] [2021-06-05 04:56:05,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786870188] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:05,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:05,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:05,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093466898] [2021-06-05 04:56:05,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:05,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:05,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:05,078 INFO L87 Difference]: Start difference. First operand 268 states and 813 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,158 INFO L93 Difference]: Finished difference Result 435 states and 1255 transitions. [2021-06-05 04:56:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:05,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,158 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:56:05,158 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 04:56:05,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 04:56:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 274. [2021-06-05 04:56:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.029304029304029) internal successors, (827), 273 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 827 transitions. [2021-06-05 04:56:05,162 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 827 transitions. Word has length 19 [2021-06-05 04:56:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,162 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 827 transitions. [2021-06-05 04:56:05,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 827 transitions. [2021-06-05 04:56:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:05,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:05,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2021-06-05 04:56:05,162 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:05,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1590050147, now seen corresponding path program 18 times [2021-06-05 04:56:05,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:05,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396465748] [2021-06-05 04:56:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:05,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396465748] [2021-06-05 04:56:05,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396465748] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:05,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:05,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:05,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783709008] [2021-06-05 04:56:05,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:05,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:05,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:05,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:05,191 INFO L87 Difference]: Start difference. First operand 274 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,271 INFO L93 Difference]: Finished difference Result 413 states and 1218 transitions. [2021-06-05 04:56:05,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:05,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:05,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,272 INFO L225 Difference]: With dead ends: 413 [2021-06-05 04:56:05,272 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 04:56:05,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 04:56:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 253. [2021-06-05 04:56:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.0277777777777777) internal successors, (763), 252 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-06-05 04:56:05,277 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 19 [2021-06-05 04:56:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,277 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-06-05 04:56:05,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-06-05 04:56:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:05,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,278 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:05,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2021-06-05 04:56:05,278 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:05,278 INFO L82 PathProgramCache]: Analyzing trace with hash 53973003, now seen corresponding path program 19 times [2021-06-05 04:56:05,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:05,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90861565] [2021-06-05 04:56:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:05,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90861565] [2021-06-05 04:56:05,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90861565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:05,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:05,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:05,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64297013] [2021-06-05 04:56:05,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:05,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:05,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:05,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:05,305 INFO L87 Difference]: Start difference. First operand 253 states and 763 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,388 INFO L93 Difference]: Finished difference Result 398 states and 1147 transitions. [2021-06-05 04:56:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,389 INFO L225 Difference]: With dead ends: 398 [2021-06-05 04:56:05,389 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 04:56:05,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 04:56:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 259. [2021-06-05 04:56:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.0232558139534884) internal successors, (780), 258 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 780 transitions. [2021-06-05 04:56:05,392 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 780 transitions. Word has length 19 [2021-06-05 04:56:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,392 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 780 transitions. [2021-06-05 04:56:05,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 780 transitions. [2021-06-05 04:56:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:05,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,393 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:05,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2021-06-05 04:56:05,393 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash -481846493, now seen corresponding path program 20 times [2021-06-05 04:56:05,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:05,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794911631] [2021-06-05 04:56:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:05,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794911631] [2021-06-05 04:56:05,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794911631] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:05,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:05,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:05,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440979118] [2021-06-05 04:56:05,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:05,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:05,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:05,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:05,423 INFO L87 Difference]: Start difference. First operand 259 states and 780 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,522 INFO L93 Difference]: Finished difference Result 427 states and 1201 transitions. [2021-06-05 04:56:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:05,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,523 INFO L225 Difference]: With dead ends: 427 [2021-06-05 04:56:05,523 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 04:56:05,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 04:56:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 275. [2021-06-05 04:56:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0072992700729926) internal successors, (824), 274 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 824 transitions. [2021-06-05 04:56:05,526 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 824 transitions. Word has length 19 [2021-06-05 04:56:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,526 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 824 transitions. [2021-06-05 04:56:05,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 824 transitions. [2021-06-05 04:56:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:05,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,527 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:05,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2021-06-05 04:56:05,527 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash -101108853, now seen corresponding path program 21 times [2021-06-05 04:56:05,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:05,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840463186] [2021-06-05 04:56:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:05,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840463186] [2021-06-05 04:56:05,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840463186] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:05,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:05,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:05,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145577633] [2021-06-05 04:56:05,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:05,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:05,553 INFO L87 Difference]: Start difference. First operand 275 states and 824 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,660 INFO L93 Difference]: Finished difference Result 390 states and 1115 transitions. [2021-06-05 04:56:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:05,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,660 INFO L225 Difference]: With dead ends: 390 [2021-06-05 04:56:05,660 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 04:56:05,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 04:56:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 265. [2021-06-05 04:56:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.015151515151515) internal successors, (796), 264 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 796 transitions. [2021-06-05 04:56:05,664 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 796 transitions. Word has length 19 [2021-06-05 04:56:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,664 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 796 transitions. [2021-06-05 04:56:05,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 796 transitions. [2021-06-05 04:56:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:05,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:05,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2021-06-05 04:56:05,664 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:05,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:05,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1901365676, now seen corresponding path program 19 times [2021-06-05 04:56:05,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:05,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969919164] [2021-06-05 04:56:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969919164] [2021-06-05 04:56:05,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969919164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854003384] [2021-06-05 04:56:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854003384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:05,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:05,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:05,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093209566] [2021-06-05 04:56:05,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:05,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:05,751 INFO L87 Difference]: Start difference. First operand 265 states and 796 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:05,825 INFO L93 Difference]: Finished difference Result 537 states and 1572 transitions. [2021-06-05 04:56:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:05,826 INFO L225 Difference]: With dead ends: 537 [2021-06-05 04:56:05,826 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 04:56:05,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 04:56:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 271. [2021-06-05 04:56:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.025925925925926) internal successors, (817), 270 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 817 transitions. [2021-06-05 04:56:05,830 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 817 transitions. Word has length 19 [2021-06-05 04:56:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:05,830 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 817 transitions. [2021-06-05 04:56:05,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 817 transitions. [2021-06-05 04:56:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:05,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:05,831 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:06,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 04:56:06,031 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:06,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2057197508, now seen corresponding path program 20 times [2021-06-05 04:56:06,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:06,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765966108] [2021-06-05 04:56:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:06,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765966108] [2021-06-05 04:56:06,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765966108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986177117] [2021-06-05 04:56:06,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:06,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:06,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:06,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986177117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:06,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:06,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424596641] [2021-06-05 04:56:06,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:06,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:06,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:06,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:06,151 INFO L87 Difference]: Start difference. First operand 271 states and 817 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:06,235 INFO L93 Difference]: Finished difference Result 552 states and 1596 transitions. [2021-06-05 04:56:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:06,236 INFO L225 Difference]: With dead ends: 552 [2021-06-05 04:56:06,236 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 04:56:06,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 04:56:06,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 277. [2021-06-05 04:56:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0579710144927534) internal successors, (844), 276 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 844 transitions. [2021-06-05 04:56:06,240 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 844 transitions. Word has length 19 [2021-06-05 04:56:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:06,240 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 844 transitions. [2021-06-05 04:56:06,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 844 transitions. [2021-06-05 04:56:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:06,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:06,241 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:06,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:06,450 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:06,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1127036332, now seen corresponding path program 21 times [2021-06-05 04:56:06,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:06,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050296412] [2021-06-05 04:56:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:06,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050296412] [2021-06-05 04:56:06,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050296412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326922932] [2021-06-05 04:56:06,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:06,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:06,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:06,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326922932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:06,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:06,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219925353] [2021-06-05 04:56:06,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:06,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:06,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:06,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:06,551 INFO L87 Difference]: Start difference. First operand 277 states and 844 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:06,624 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-06-05 04:56:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:06,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:06,625 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:56:06,625 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 04:56:06,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 04:56:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 274. [2021-06-05 04:56:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.0549450549450547) internal successors, (834), 273 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 834 transitions. [2021-06-05 04:56:06,629 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 834 transitions. Word has length 19 [2021-06-05 04:56:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:06,629 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 834 transitions. [2021-06-05 04:56:06,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 834 transitions. [2021-06-05 04:56:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:06,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:06,629 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:06,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:06,830 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1979218041, now seen corresponding path program 22 times [2021-06-05 04:56:06,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:06,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608376972] [2021-06-05 04:56:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:06,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608376972] [2021-06-05 04:56:06,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608376972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906848234] [2021-06-05 04:56:06,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:06,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:06,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:06,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906848234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:06,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:06,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:06,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038704919] [2021-06-05 04:56:06,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:06,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:06,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:06,944 INFO L87 Difference]: Start difference. First operand 274 states and 834 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:07,033 INFO L93 Difference]: Finished difference Result 476 states and 1382 transitions. [2021-06-05 04:56:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:07,034 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:56:07,034 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 04:56:07,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 04:56:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 271. [2021-06-05 04:56:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.051851851851852) internal successors, (824), 270 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-06-05 04:56:07,037 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-06-05 04:56:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:07,037 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-06-05 04:56:07,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-06-05 04:56:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:07,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:07,038 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:07,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:07,253 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:07,253 INFO L82 PathProgramCache]: Analyzing trace with hash 16056364, now seen corresponding path program 22 times [2021-06-05 04:56:07,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:07,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148171094] [2021-06-05 04:56:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:07,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:07,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148171094] [2021-06-05 04:56:07,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148171094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:07,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660946958] [2021-06-05 04:56:07,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:07,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:07,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660946958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:07,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:07,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:07,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673909531] [2021-06-05 04:56:07,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:07,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:07,345 INFO L87 Difference]: Start difference. First operand 271 states and 824 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:07,431 INFO L93 Difference]: Finished difference Result 539 states and 1596 transitions. [2021-06-05 04:56:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:07,433 INFO L225 Difference]: With dead ends: 539 [2021-06-05 04:56:07,433 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 04:56:07,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 04:56:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 259. [2021-06-05 04:56:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.0310077519379846) internal successors, (782), 258 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 782 transitions. [2021-06-05 04:56:07,437 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 782 transitions. Word has length 19 [2021-06-05 04:56:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:07,437 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 782 transitions. [2021-06-05 04:56:07,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 782 transitions. [2021-06-05 04:56:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:07,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:07,437 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:07,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:07,641 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash -366317049, now seen corresponding path program 23 times [2021-06-05 04:56:07,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:07,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179393055] [2021-06-05 04:56:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:07,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179393055] [2021-06-05 04:56:07,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179393055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697911068] [2021-06-05 04:56:07,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:07,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:07,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:07,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697911068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:07,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:07,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707182248] [2021-06-05 04:56:07,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:07,756 INFO L87 Difference]: Start difference. First operand 259 states and 782 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:07,830 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-06-05 04:56:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:07,831 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:56:07,831 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 04:56:07,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 04:56:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 275. [2021-06-05 04:56:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0583941605839415) internal successors, (838), 274 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-06-05 04:56:07,835 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-06-05 04:56:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:07,835 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-06-05 04:56:07,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-06-05 04:56:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:07,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:07,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:08,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 04:56:08,057 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash -334370096, now seen corresponding path program 23 times [2021-06-05 04:56:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:08,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290417914] [2021-06-05 04:56:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:08,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:08,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290417914] [2021-06-05 04:56:08,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290417914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:08,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965576654] [2021-06-05 04:56:08,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:08,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:08,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:08,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:08,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965576654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:08,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:08,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:08,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602903851] [2021-06-05 04:56:08,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:08,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:08,154 INFO L87 Difference]: Start difference. First operand 275 states and 838 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:08,245 INFO L93 Difference]: Finished difference Result 532 states and 1566 transitions. [2021-06-05 04:56:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:08,246 INFO L225 Difference]: With dead ends: 532 [2021-06-05 04:56:08,246 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 04:56:08,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 04:56:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 275. [2021-06-05 04:56:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0583941605839415) internal successors, (838), 274 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-06-05 04:56:08,250 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-06-05 04:56:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:08,250 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-06-05 04:56:08,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-06-05 04:56:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:08,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:08,250 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:08,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:08,451 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:08,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2088629120, now seen corresponding path program 24 times [2021-06-05 04:56:08,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:08,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065245723] [2021-06-05 04:56:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:08,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:08,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065245723] [2021-06-05 04:56:08,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065245723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:08,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035290450] [2021-06-05 04:56:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:08,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:08,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:08,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035290450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:08,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:08,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:08,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557861078] [2021-06-05 04:56:08,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:08,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:08,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:08,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:08,541 INFO L87 Difference]: Start difference. First operand 275 states and 838 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:08,613 INFO L93 Difference]: Finished difference Result 478 states and 1416 transitions. [2021-06-05 04:56:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:08,614 INFO L225 Difference]: With dead ends: 478 [2021-06-05 04:56:08,614 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 04:56:08,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 04:56:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 275. [2021-06-05 04:56:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0437956204379564) internal successors, (834), 274 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 834 transitions. [2021-06-05 04:56:08,618 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 834 transitions. Word has length 19 [2021-06-05 04:56:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:08,618 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 834 transitions. [2021-06-05 04:56:08,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 834 transitions. [2021-06-05 04:56:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:08,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:08,618 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:08,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:08,819 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash 112967627, now seen corresponding path program 24 times [2021-06-05 04:56:08,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:08,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784452490] [2021-06-05 04:56:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:08,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:08,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784452490] [2021-06-05 04:56:08,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784452490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:08,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826125512] [2021-06-05 04:56:08,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:08,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:08,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826125512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:08,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:08,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:08,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542894366] [2021-06-05 04:56:08,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:08,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:08,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:08,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:08,932 INFO L87 Difference]: Start difference. First operand 275 states and 834 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:09,023 INFO L93 Difference]: Finished difference Result 445 states and 1322 transitions. [2021-06-05 04:56:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:09,025 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:56:09,025 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 04:56:09,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 04:56:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 255. [2021-06-05 04:56:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.031496062992126) internal successors, (770), 254 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-06-05 04:56:09,028 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-06-05 04:56:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:09,028 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-06-05 04:56:09,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-06-05 04:56:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:09,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:09,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:09,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 04:56:09,229 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 510647071, now seen corresponding path program 25 times [2021-06-05 04:56:09,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566277692] [2021-06-05 04:56:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:09,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566277692] [2021-06-05 04:56:09,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566277692] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:09,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:09,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:09,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55201340] [2021-06-05 04:56:09,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:09,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:09,256 INFO L87 Difference]: Start difference. First operand 255 states and 770 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:09,353 INFO L93 Difference]: Finished difference Result 454 states and 1310 transitions. [2021-06-05 04:56:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:09,354 INFO L225 Difference]: With dead ends: 454 [2021-06-05 04:56:09,354 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:56:09,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:56:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 275. [2021-06-05 04:56:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.051094890510949) internal successors, (836), 274 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-06-05 04:56:09,357 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-06-05 04:56:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:09,357 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-06-05 04:56:09,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-06-05 04:56:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:09,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:09,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:09,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2021-06-05 04:56:09,358 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash 891384711, now seen corresponding path program 26 times [2021-06-05 04:56:09,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:09,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809997824] [2021-06-05 04:56:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:09,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809997824] [2021-06-05 04:56:09,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809997824] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:09,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:09,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940929234] [2021-06-05 04:56:09,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:09,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:09,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:09,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:09,385 INFO L87 Difference]: Start difference. First operand 275 states and 836 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:09,479 INFO L93 Difference]: Finished difference Result 460 states and 1325 transitions. [2021-06-05 04:56:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:09,480 INFO L225 Difference]: With dead ends: 460 [2021-06-05 04:56:09,480 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 04:56:09,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 04:56:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 279. [2021-06-05 04:56:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.039568345323741) internal successors, (845), 278 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 845 transitions. [2021-06-05 04:56:09,483 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 845 transitions. Word has length 19 [2021-06-05 04:56:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:09,483 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 845 transitions. [2021-06-05 04:56:09,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 845 transitions. [2021-06-05 04:56:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:09,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:09,484 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:09,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2021-06-05 04:56:09,484 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:09,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1851957296, now seen corresponding path program 25 times [2021-06-05 04:56:09,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:09,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608152759] [2021-06-05 04:56:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:09,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608152759] [2021-06-05 04:56:09,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608152759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:09,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234051203] [2021-06-05 04:56:09,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234051203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:09,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:09,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:09,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359454753] [2021-06-05 04:56:09,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:09,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:09,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:09,587 INFO L87 Difference]: Start difference. First operand 279 states and 845 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:09,672 INFO L93 Difference]: Finished difference Result 519 states and 1519 transitions. [2021-06-05 04:56:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:09,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:09,673 INFO L225 Difference]: With dead ends: 519 [2021-06-05 04:56:09,673 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 04:56:09,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 04:56:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 285. [2021-06-05 04:56:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0704225352112675) internal successors, (872), 284 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 872 transitions. [2021-06-05 04:56:09,677 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 872 transitions. Word has length 19 [2021-06-05 04:56:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:09,677 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 872 transitions. [2021-06-05 04:56:09,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 872 transitions. [2021-06-05 04:56:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:09,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:09,677 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:09,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:09,878 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash -921796120, now seen corresponding path program 26 times [2021-06-05 04:56:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:09,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139116234] [2021-06-05 04:56:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:09,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139116234] [2021-06-05 04:56:09,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139116234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:09,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732357491] [2021-06-05 04:56:09,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:09,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:09,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732357491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:09,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:09,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:09,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650333946] [2021-06-05 04:56:09,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:09,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:09,981 INFO L87 Difference]: Start difference. First operand 285 states and 872 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:10,049 INFO L93 Difference]: Finished difference Result 501 states and 1450 transitions. [2021-06-05 04:56:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:10,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:10,050 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:56:10,050 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 04:56:10,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 04:56:10,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 284. [2021-06-05 04:56:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0636042402826855) internal successors, (867), 283 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 867 transitions. [2021-06-05 04:56:10,054 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 867 transitions. Word has length 19 [2021-06-05 04:56:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:10,054 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 867 transitions. [2021-06-05 04:56:10,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 867 transitions. [2021-06-05 04:56:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:10,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:10,054 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:10,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-05 04:56:10,255 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:10,255 INFO L82 PathProgramCache]: Analyzing trace with hash 306512931, now seen corresponding path program 27 times [2021-06-05 04:56:10,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:10,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882636950] [2021-06-05 04:56:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:10,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:10,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882636950] [2021-06-05 04:56:10,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882636950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:10,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556031910] [2021-06-05 04:56:10,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:10,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:10,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:10,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:10,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:10,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556031910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:10,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:10,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:10,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455371297] [2021-06-05 04:56:10,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:10,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:10,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:10,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:10,370 INFO L87 Difference]: Start difference. First operand 284 states and 867 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:10,457 INFO L93 Difference]: Finished difference Result 478 states and 1372 transitions. [2021-06-05 04:56:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:10,458 INFO L225 Difference]: With dead ends: 478 [2021-06-05 04:56:10,458 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 04:56:10,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 04:56:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 284. [2021-06-05 04:56:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0742049469964665) internal successors, (870), 283 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 870 transitions. [2021-06-05 04:56:10,461 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 870 transitions. Word has length 19 [2021-06-05 04:56:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:10,462 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 870 transitions. [2021-06-05 04:56:10,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 870 transitions. [2021-06-05 04:56:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:10,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:10,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:10,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:10,662 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1651557640, now seen corresponding path program 27 times [2021-06-05 04:56:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:10,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970594249] [2021-06-05 04:56:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:10,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:10,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970594249] [2021-06-05 04:56:10,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970594249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:10,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668418472] [2021-06-05 04:56:10,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:10,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:56:10,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:10,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668418472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:10,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:10,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:10,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766880054] [2021-06-05 04:56:10,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:10,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:10,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:10,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:10,775 INFO L87 Difference]: Start difference. First operand 284 states and 870 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:10,850 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-06-05 04:56:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:10,851 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:56:10,851 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:56:10,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:56:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 275. [2021-06-05 04:56:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.065693430656934) internal successors, (840), 274 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 840 transitions. [2021-06-05 04:56:10,854 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 840 transitions. Word has length 19 [2021-06-05 04:56:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:10,854 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 840 transitions. [2021-06-05 04:56:10,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 840 transitions. [2021-06-05 04:56:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:10,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:10,855 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:11,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 04:56:11,055 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1732798312, now seen corresponding path program 28 times [2021-06-05 04:56:11,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:11,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183260781] [2021-06-05 04:56:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:11,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:11,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183260781] [2021-06-05 04:56:11,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183260781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:11,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908843725] [2021-06-05 04:56:11,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:11,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:11,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908843725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:11,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:11,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:11,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903355013] [2021-06-05 04:56:11,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:11,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:11,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:11,156 INFO L87 Difference]: Start difference. First operand 275 states and 840 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:11,263 INFO L93 Difference]: Finished difference Result 453 states and 1315 transitions. [2021-06-05 04:56:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:11,264 INFO L225 Difference]: With dead ends: 453 [2021-06-05 04:56:11,264 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 04:56:11,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 04:56:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 275. [2021-06-05 04:56:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.051094890510949) internal successors, (836), 274 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-06-05 04:56:11,267 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-06-05 04:56:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:11,267 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-06-05 04:56:11,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-06-05 04:56:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:11,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:11,268 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:11,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:11,475 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash 586507491, now seen corresponding path program 28 times [2021-06-05 04:56:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:11,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936316839] [2021-06-05 04:56:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:11,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:11,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936316839] [2021-06-05 04:56:11,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936316839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:11,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920925309] [2021-06-05 04:56:11,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:11,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920925309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:11,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:11,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:11,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520041742] [2021-06-05 04:56:11,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:11,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:11,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:11,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:11,591 INFO L87 Difference]: Start difference. First operand 275 states and 836 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:11,689 INFO L93 Difference]: Finished difference Result 450 states and 1322 transitions. [2021-06-05 04:56:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:11,690 INFO L225 Difference]: With dead ends: 450 [2021-06-05 04:56:11,690 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 04:56:11,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 04:56:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 271. [2021-06-05 04:56:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.051851851851852) internal successors, (824), 270 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-06-05 04:56:11,693 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-06-05 04:56:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:11,693 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-06-05 04:56:11,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-06-05 04:56:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:11,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:11,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:11,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 04:56:11,894 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:11,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1108954472, now seen corresponding path program 29 times [2021-06-05 04:56:11,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:11,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978973049] [2021-06-05 04:56:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:11,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:11,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978973049] [2021-06-05 04:56:11,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978973049] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:11,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:11,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:11,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193599356] [2021-06-05 04:56:11,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:11,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:11,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:11,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:11,920 INFO L87 Difference]: Start difference. First operand 271 states and 824 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:11,993 INFO L93 Difference]: Finished difference Result 424 states and 1226 transitions. [2021-06-05 04:56:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:11,994 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:56:11,994 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:56:11,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:56:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 281. [2021-06-05 04:56:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.032142857142857) internal successors, (849), 280 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 849 transitions. [2021-06-05 04:56:11,997 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 849 transitions. Word has length 19 [2021-06-05 04:56:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:11,997 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 849 transitions. [2021-06-05 04:56:11,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 849 transitions. [2021-06-05 04:56:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:11,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:11,997 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:11,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2021-06-05 04:56:11,998 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2084098672, now seen corresponding path program 30 times [2021-06-05 04:56:11,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:11,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747909205] [2021-06-05 04:56:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:12,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747909205] [2021-06-05 04:56:12,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747909205] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:12,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:12,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:12,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126213305] [2021-06-05 04:56:12,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:12,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:12,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:12,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:12,022 INFO L87 Difference]: Start difference. First operand 281 states and 849 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:12,092 INFO L93 Difference]: Finished difference Result 388 states and 1143 transitions. [2021-06-05 04:56:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:12,093 INFO L225 Difference]: With dead ends: 388 [2021-06-05 04:56:12,093 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 04:56:12,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 04:56:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 271. [2021-06-05 04:56:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0481481481481483) internal successors, (823), 270 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 823 transitions. [2021-06-05 04:56:12,096 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 823 transitions. Word has length 19 [2021-06-05 04:56:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:12,096 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 823 transitions. [2021-06-05 04:56:12,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 823 transitions. [2021-06-05 04:56:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:12,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:12,097 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:12,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2021-06-05 04:56:12,097 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash -384942261, now seen corresponding path program 29 times [2021-06-05 04:56:12,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:12,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628532238] [2021-06-05 04:56:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:12,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628532238] [2021-06-05 04:56:12,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628532238] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:12,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:12,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:12,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367082775] [2021-06-05 04:56:12,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:12,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:12,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:12,125 INFO L87 Difference]: Start difference. First operand 271 states and 823 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:12,224 INFO L93 Difference]: Finished difference Result 401 states and 1166 transitions. [2021-06-05 04:56:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:12,225 INFO L225 Difference]: With dead ends: 401 [2021-06-05 04:56:12,225 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 04:56:12,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 04:56:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 277. [2021-06-05 04:56:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.032608695652174) internal successors, (837), 276 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 837 transitions. [2021-06-05 04:56:12,228 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 837 transitions. Word has length 19 [2021-06-05 04:56:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:12,228 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 837 transitions. [2021-06-05 04:56:12,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 837 transitions. [2021-06-05 04:56:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:12,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:12,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:12,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2021-06-05 04:56:12,228 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash -114432569, now seen corresponding path program 30 times [2021-06-05 04:56:12,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:12,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475547815] [2021-06-05 04:56:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:12,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475547815] [2021-06-05 04:56:12,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475547815] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:12,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:12,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:12,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219909842] [2021-06-05 04:56:12,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:12,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:12,259 INFO L87 Difference]: Start difference. First operand 277 states and 837 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:12,361 INFO L93 Difference]: Finished difference Result 379 states and 1129 transitions. [2021-06-05 04:56:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:12,362 INFO L225 Difference]: With dead ends: 379 [2021-06-05 04:56:12,362 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 04:56:12,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 04:56:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 255. [2021-06-05 04:56:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.031496062992126) internal successors, (770), 254 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-06-05 04:56:12,365 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-06-05 04:56:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:12,365 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-06-05 04:56:12,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-06-05 04:56:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:12,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:12,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:12,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2021-06-05 04:56:12,368 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 401252280, now seen corresponding path program 31 times [2021-06-05 04:56:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:12,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577305911] [2021-06-05 04:56:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577305911] [2021-06-05 04:56:12,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577305911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111082920] [2021-06-05 04:56:12,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111082920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:12,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:12,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:12,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257832314] [2021-06-05 04:56:12,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:12,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:12,466 INFO L87 Difference]: Start difference. First operand 255 states and 770 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:12,535 INFO L93 Difference]: Finished difference Result 485 states and 1377 transitions. [2021-06-05 04:56:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:12,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:12,536 INFO L225 Difference]: With dead ends: 485 [2021-06-05 04:56:12,536 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 04:56:12,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 04:56:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 255. [2021-06-05 04:56:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0039370078740157) internal successors, (763), 254 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-06-05 04:56:12,539 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-06-05 04:56:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:12,539 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-06-05 04:56:12,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-06-05 04:56:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:12,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:12,540 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:12,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:12,740 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash 317204657, now seen corresponding path program 31 times [2021-06-05 04:56:12,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:12,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52621185] [2021-06-05 04:56:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:12,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52621185] [2021-06-05 04:56:12,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52621185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:12,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44211719] [2021-06-05 04:56:12,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:12,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44211719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:12,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646208390] [2021-06-05 04:56:12,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:12,826 INFO L87 Difference]: Start difference. First operand 255 states and 763 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:12,905 INFO L93 Difference]: Finished difference Result 428 states and 1251 transitions. [2021-06-05 04:56:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:12,905 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:12,906 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:56:12,906 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:56:12,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:56:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 255. [2021-06-05 04:56:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0039370078740157) internal successors, (763), 254 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-06-05 04:56:12,909 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-06-05 04:56:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:12,909 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-06-05 04:56:12,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-06-05 04:56:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:12,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:12,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:13,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 04:56:13,111 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:13,111 INFO L82 PathProgramCache]: Analyzing trace with hash -27612327, now seen corresponding path program 32 times [2021-06-05 04:56:13,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:13,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172698793] [2021-06-05 04:56:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:13,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:13,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172698793] [2021-06-05 04:56:13,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172698793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:13,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771807480] [2021-06-05 04:56:13,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:13,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:13,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:13,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771807480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:13,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:13,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:13,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9102494] [2021-06-05 04:56:13,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:13,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:13,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:13,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:13,202 INFO L87 Difference]: Start difference. First operand 255 states and 763 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:13,270 INFO L93 Difference]: Finished difference Result 425 states and 1238 transitions. [2021-06-05 04:56:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:13,271 INFO L225 Difference]: With dead ends: 425 [2021-06-05 04:56:13,271 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 04:56:13,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 04:56:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 271. [2021-06-05 04:56:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.033333333333333) internal successors, (819), 270 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-06-05 04:56:13,274 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-06-05 04:56:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:13,274 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-06-05 04:56:13,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-06-05 04:56:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:13,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:13,275 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:13,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 04:56:13,475 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash 4334626, now seen corresponding path program 32 times [2021-06-05 04:56:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:13,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703910464] [2021-06-05 04:56:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:13,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:13,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703910464] [2021-06-05 04:56:13,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703910464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:13,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159026631] [2021-06-05 04:56:13,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:13,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:13,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:13,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:13,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:13,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159026631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:13,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:13,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779547136] [2021-06-05 04:56:13,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:13,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:13,591 INFO L87 Difference]: Start difference. First operand 271 states and 819 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:13,689 INFO L93 Difference]: Finished difference Result 489 states and 1412 transitions. [2021-06-05 04:56:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:13,690 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:56:13,690 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:56:13,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:56:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-06-05 04:56:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.033333333333333) internal successors, (819), 270 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-06-05 04:56:13,693 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-06-05 04:56:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:13,693 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-06-05 04:56:13,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-06-05 04:56:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:13,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:13,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:13,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:13,894 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:13,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1867633454, now seen corresponding path program 33 times [2021-06-05 04:56:13,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:13,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87064938] [2021-06-05 04:56:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:13,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:13,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87064938] [2021-06-05 04:56:13,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87064938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:13,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508073619] [2021-06-05 04:56:13,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:13,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508073619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:14,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:14,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:14,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467095909] [2021-06-05 04:56:14,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:14,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:14,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:14,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:14,003 INFO L87 Difference]: Start difference. First operand 271 states and 819 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:14,087 INFO L93 Difference]: Finished difference Result 498 states and 1425 transitions. [2021-06-05 04:56:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:14,088 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:56:14,088 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:56:14,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:56:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-06-05 04:56:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0185185185185186) internal successors, (815), 270 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 815 transitions. [2021-06-05 04:56:14,092 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 815 transitions. Word has length 19 [2021-06-05 04:56:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:14,092 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 815 transitions. [2021-06-05 04:56:14,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 815 transitions. [2021-06-05 04:56:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:14,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:14,092 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:14,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 04:56:14,292 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash 451672349, now seen corresponding path program 33 times [2021-06-05 04:56:14,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:14,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420841274] [2021-06-05 04:56:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:14,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420841274] [2021-06-05 04:56:14,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420841274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:14,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508108125] [2021-06-05 04:56:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:14,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:14,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508108125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:14,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:14,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:14,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842641233] [2021-06-05 04:56:14,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:14,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:14,389 INFO L87 Difference]: Start difference. First operand 271 states and 815 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:14,464 INFO L93 Difference]: Finished difference Result 447 states and 1310 transitions. [2021-06-05 04:56:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:14,465 INFO L225 Difference]: With dead ends: 447 [2021-06-05 04:56:14,465 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 04:56:14,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 04:56:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 260. [2021-06-05 04:56:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.0193050193050195) internal successors, (782), 259 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 782 transitions. [2021-06-05 04:56:14,468 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 782 transitions. Word has length 19 [2021-06-05 04:56:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:14,468 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 782 transitions. [2021-06-05 04:56:14,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 782 transitions. [2021-06-05 04:56:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:14,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:14,469 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:14,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:14,669 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash 256701904, now seen corresponding path program 34 times [2021-06-05 04:56:14,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:14,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422309415] [2021-06-05 04:56:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:14,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422309415] [2021-06-05 04:56:14,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422309415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:14,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:14,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:14,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370082803] [2021-06-05 04:56:14,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:14,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:14,694 INFO L87 Difference]: Start difference. First operand 260 states and 782 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:14,757 INFO L93 Difference]: Finished difference Result 556 states and 1559 transitions. [2021-06-05 04:56:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:14,758 INFO L225 Difference]: With dead ends: 556 [2021-06-05 04:56:14,758 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 04:56:14,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 04:56:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 264. [2021-06-05 04:56:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-06-05 04:56:14,761 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 19 [2021-06-05 04:56:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-06-05 04:56:14,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-06-05 04:56:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:14,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:14,762 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:14,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2021-06-05 04:56:14,762 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:14,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:14,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2084615198, now seen corresponding path program 35 times [2021-06-05 04:56:14,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:14,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900481542] [2021-06-05 04:56:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900481542] [2021-06-05 04:56:14,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900481542] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:14,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:14,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884299207] [2021-06-05 04:56:14,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:14,791 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:14,859 INFO L93 Difference]: Finished difference Result 540 states and 1513 transitions. [2021-06-05 04:56:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:14,860 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:56:14,860 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 04:56:14,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 04:56:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 274. [2021-06-05 04:56:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.978021978021978) internal successors, (813), 273 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 813 transitions. [2021-06-05 04:56:14,863 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 813 transitions. Word has length 19 [2021-06-05 04:56:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:14,863 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 813 transitions. [2021-06-05 04:56:14,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 813 transitions. [2021-06-05 04:56:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:14,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:14,864 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:14,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2021-06-05 04:56:14,864 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash -180498166, now seen corresponding path program 36 times [2021-06-05 04:56:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:14,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068245211] [2021-06-05 04:56:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:14,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068245211] [2021-06-05 04:56:14,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068245211] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:14,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:14,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:14,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364084760] [2021-06-05 04:56:14,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:14,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:14,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:14,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:14,892 INFO L87 Difference]: Start difference. First operand 274 states and 813 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:14,963 INFO L93 Difference]: Finished difference Result 504 states and 1430 transitions. [2021-06-05 04:56:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:14,964 INFO L225 Difference]: With dead ends: 504 [2021-06-05 04:56:14,964 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:56:14,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:56:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 260. [2021-06-05 04:56:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.011583011583012) internal successors, (780), 259 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-06-05 04:56:14,968 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-06-05 04:56:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:14,968 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-06-05 04:56:14,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:14,968 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-06-05 04:56:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:14,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:14,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:14,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2021-06-05 04:56:14,968 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash -136390839, now seen corresponding path program 34 times [2021-06-05 04:56:14,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:14,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415329825] [2021-06-05 04:56:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:14,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415329825] [2021-06-05 04:56:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415329825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881165223] [2021-06-05 04:56:14,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:15,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:15,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:15,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:15,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881165223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:15,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:15,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:15,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482407455] [2021-06-05 04:56:15,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:15,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:15,072 INFO L87 Difference]: Start difference. First operand 260 states and 780 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:15,155 INFO L93 Difference]: Finished difference Result 588 states and 1723 transitions. [2021-06-05 04:56:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:15,156 INFO L225 Difference]: With dead ends: 588 [2021-06-05 04:56:15,156 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 04:56:15,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 04:56:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 266. [2021-06-05 04:56:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0113207547169814) internal successors, (798), 265 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 798 transitions. [2021-06-05 04:56:15,160 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 798 transitions. Word has length 19 [2021-06-05 04:56:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:15,160 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 798 transitions. [2021-06-05 04:56:15,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 798 transitions. [2021-06-05 04:56:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:15,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:15,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:15,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 04:56:15,361 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:15,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1036563747, now seen corresponding path program 35 times [2021-06-05 04:56:15,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:15,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634208928] [2021-06-05 04:56:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:15,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:15,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634208928] [2021-06-05 04:56:15,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634208928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:15,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501688838] [2021-06-05 04:56:15,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:15,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:15,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501688838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:15,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:15,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:15,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222669576] [2021-06-05 04:56:15,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:15,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:15,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:15,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:15,452 INFO L87 Difference]: Start difference. First operand 266 states and 798 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:15,524 INFO L93 Difference]: Finished difference Result 527 states and 1532 transitions. [2021-06-05 04:56:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:15,525 INFO L225 Difference]: With dead ends: 527 [2021-06-05 04:56:15,525 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:56:15,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:56:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 278. [2021-06-05 04:56:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0216606498194944) internal successors, (837), 277 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 837 transitions. [2021-06-05 04:56:15,529 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 837 transitions. Word has length 19 [2021-06-05 04:56:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:15,529 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 837 transitions. [2021-06-05 04:56:15,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 837 transitions. [2021-06-05 04:56:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:15,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:15,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:15,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 04:56:15,730 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:15,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2043043929, now seen corresponding path program 36 times [2021-06-05 04:56:15,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:15,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696749772] [2021-06-05 04:56:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:15,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:15,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696749772] [2021-06-05 04:56:15,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696749772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:15,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109461631] [2021-06-05 04:56:15,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:15,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:15,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:15,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109461631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:15,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:15,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:15,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849632572] [2021-06-05 04:56:15,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:15,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:15,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:15,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:15,825 INFO L87 Difference]: Start difference. First operand 278 states and 837 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:15,902 INFO L93 Difference]: Finished difference Result 505 states and 1485 transitions. [2021-06-05 04:56:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:15,903 INFO L225 Difference]: With dead ends: 505 [2021-06-05 04:56:15,903 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 04:56:15,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 04:56:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-06-05 04:56:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.011583011583012) internal successors, (780), 259 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-06-05 04:56:15,907 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-06-05 04:56:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:15,907 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-06-05 04:56:15,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-06-05 04:56:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:15,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:15,907 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:16,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 04:56:16,108 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -695873807, now seen corresponding path program 37 times [2021-06-05 04:56:16,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:16,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737243479] [2021-06-05 04:56:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:16,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:16,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737243479] [2021-06-05 04:56:16,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737243479] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:16,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:16,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:16,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963117481] [2021-06-05 04:56:16,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:16,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:16,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:16,150 INFO L87 Difference]: Start difference. First operand 260 states and 780 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:16,222 INFO L93 Difference]: Finished difference Result 507 states and 1464 transitions. [2021-06-05 04:56:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:16,223 INFO L225 Difference]: With dead ends: 507 [2021-06-05 04:56:16,223 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 04:56:16,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 04:56:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 272. [2021-06-05 04:56:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.047970479704797) internal successors, (826), 271 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-06-05 04:56:16,227 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-06-05 04:56:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:16,227 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-06-05 04:56:16,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-06-05 04:56:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:16,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:16,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:16,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2021-06-05 04:56:16,227 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash -315136167, now seen corresponding path program 38 times [2021-06-05 04:56:16,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:16,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807144412] [2021-06-05 04:56:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:16,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807144412] [2021-06-05 04:56:16,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807144412] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:16,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:16,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:16,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842007257] [2021-06-05 04:56:16,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:16,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:16,259 INFO L87 Difference]: Start difference. First operand 272 states and 826 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:16,340 INFO L93 Difference]: Finished difference Result 497 states and 1439 transitions. [2021-06-05 04:56:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:16,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:16,341 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:56:16,341 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:56:16,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:16,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:56:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 276. [2021-06-05 04:56:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-06-05 04:56:16,344 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-06-05 04:56:16,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:16,344 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-06-05 04:56:16,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,344 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-06-05 04:56:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:16,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:16,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:16,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2021-06-05 04:56:16,345 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:16,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1236489122, now seen corresponding path program 37 times [2021-06-05 04:56:16,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:16,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841134764] [2021-06-05 04:56:16,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:16,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:16,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841134764] [2021-06-05 04:56:16,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841134764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:16,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186925274] [2021-06-05 04:56:16,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:16,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:16,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186925274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:16,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:16,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:16,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510352521] [2021-06-05 04:56:16,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:16,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:16,462 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:16,548 INFO L93 Difference]: Finished difference Result 591 states and 1709 transitions. [2021-06-05 04:56:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:16,549 INFO L225 Difference]: With dead ends: 591 [2021-06-05 04:56:16,549 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 04:56:16,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 04:56:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 282. [2021-06-05 04:56:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.0676156583629894) internal successors, (862), 281 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 862 transitions. [2021-06-05 04:56:16,553 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 862 transitions. Word has length 19 [2021-06-05 04:56:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:16,553 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 862 transitions. [2021-06-05 04:56:16,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 862 transitions. [2021-06-05 04:56:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:16,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:16,553 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:16,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 04:56:16,769 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:16,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2128316998, now seen corresponding path program 38 times [2021-06-05 04:56:16,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:16,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425058969] [2021-06-05 04:56:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:16,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425058969] [2021-06-05 04:56:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425058969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:16,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994023167] [2021-06-05 04:56:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:16,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:16,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:16,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994023167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:16,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:16,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:16,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304652132] [2021-06-05 04:56:16,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:16,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:16,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:16,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:16,880 INFO L87 Difference]: Start difference. First operand 282 states and 862 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:16,967 INFO L93 Difference]: Finished difference Result 573 states and 1640 transitions. [2021-06-05 04:56:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:16,968 INFO L225 Difference]: With dead ends: 573 [2021-06-05 04:56:16,968 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 04:56:16,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 04:56:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 281. [2021-06-05 04:56:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0607142857142855) internal successors, (857), 280 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-06-05 04:56:16,972 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-06-05 04:56:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:16,972 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-06-05 04:56:16,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-06-05 04:56:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:16,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:16,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:17,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:17,173 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash -900007947, now seen corresponding path program 39 times [2021-06-05 04:56:17,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:17,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685380950] [2021-06-05 04:56:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:17,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685380950] [2021-06-05 04:56:17,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685380950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566386007] [2021-06-05 04:56:17,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:17,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:17,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:17,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566386007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:17,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:17,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:17,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648514462] [2021-06-05 04:56:17,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:17,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:17,273 INFO L87 Difference]: Start difference. First operand 281 states and 857 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:17,344 INFO L93 Difference]: Finished difference Result 558 states and 1599 transitions. [2021-06-05 04:56:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:17,345 INFO L225 Difference]: With dead ends: 558 [2021-06-05 04:56:17,345 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:56:17,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:56:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 281. [2021-06-05 04:56:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0714285714285716) internal successors, (860), 280 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-06-05 04:56:17,349 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-06-05 04:56:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:17,349 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-06-05 04:56:17,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-06-05 04:56:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:17,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:17,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:17,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:17,550 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1436888778, now seen corresponding path program 39 times [2021-06-05 04:56:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:17,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067452698] [2021-06-05 04:56:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:17,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067452698] [2021-06-05 04:56:17,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067452698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837056680] [2021-06-05 04:56:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:17,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:56:17,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:17,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837056680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:17,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:17,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:17,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392287853] [2021-06-05 04:56:17,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:17,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:17,667 INFO L87 Difference]: Start difference. First operand 281 states and 860 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:17,757 INFO L93 Difference]: Finished difference Result 621 states and 1765 transitions. [2021-06-05 04:56:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:17,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:17,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:17,758 INFO L225 Difference]: With dead ends: 621 [2021-06-05 04:56:17,758 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 04:56:17,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 04:56:17,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 272. [2021-06-05 04:56:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.062730627306273) internal successors, (830), 271 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-06-05 04:56:17,762 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-06-05 04:56:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:17,762 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-06-05 04:56:17,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-06-05 04:56:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:17,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:17,762 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:17,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 04:56:17,963 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1355648106, now seen corresponding path program 40 times [2021-06-05 04:56:17,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:17,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087577017] [2021-06-05 04:56:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:17,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:17,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087577017] [2021-06-05 04:56:17,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087577017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:17,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662100026] [2021-06-05 04:56:17,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:18,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:18,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662100026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:18,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:18,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:18,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973460680] [2021-06-05 04:56:18,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:18,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:18,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:18,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:18,074 INFO L87 Difference]: Start difference. First operand 272 states and 830 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:18,168 INFO L93 Difference]: Finished difference Result 576 states and 1637 transitions. [2021-06-05 04:56:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:18,169 INFO L225 Difference]: With dead ends: 576 [2021-06-05 04:56:18,169 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 04:56:18,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 04:56:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 272. [2021-06-05 04:56:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.047970479704797) internal successors, (826), 271 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-06-05 04:56:18,172 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-06-05 04:56:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:18,173 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-06-05 04:56:18,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-06-05 04:56:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:18,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:18,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:18,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,373 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:18,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:18,374 INFO L82 PathProgramCache]: Analyzing trace with hash -620013387, now seen corresponding path program 40 times [2021-06-05 04:56:18,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:18,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585772902] [2021-06-05 04:56:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:18,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585772902] [2021-06-05 04:56:18,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585772902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:18,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110983651] [2021-06-05 04:56:18,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:18,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110983651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:18,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:18,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:18,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535177736] [2021-06-05 04:56:18,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:18,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:18,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:18,482 INFO L87 Difference]: Start difference. First operand 272 states and 826 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:18,573 INFO L93 Difference]: Finished difference Result 530 states and 1549 transitions. [2021-06-05 04:56:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:18,574 INFO L225 Difference]: With dead ends: 530 [2021-06-05 04:56:18,574 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 04:56:18,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 04:56:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 264. [2021-06-05 04:56:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0190114068441063) internal successors, (794), 263 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 794 transitions. [2021-06-05 04:56:18,578 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 794 transitions. Word has length 19 [2021-06-05 04:56:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:18,579 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 794 transitions. [2021-06-05 04:56:18,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 794 transitions. [2021-06-05 04:56:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:18,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:18,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:18,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:18,780 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:18,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1979491946, now seen corresponding path program 41 times [2021-06-05 04:56:18,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:18,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179118033] [2021-06-05 04:56:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:18,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179118033] [2021-06-05 04:56:18,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179118033] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:18,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:18,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:18,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270097174] [2021-06-05 04:56:18,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:18,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:18,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:18,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:18,808 INFO L87 Difference]: Start difference. First operand 264 states and 794 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:18,883 INFO L93 Difference]: Finished difference Result 551 states and 1548 transitions. [2021-06-05 04:56:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:18,884 INFO L225 Difference]: With dead ends: 551 [2021-06-05 04:56:18,884 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 04:56:18,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 04:56:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 274. [2021-06-05 04:56:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.0) internal successors, (819), 273 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 819 transitions. [2021-06-05 04:56:18,887 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 819 transitions. Word has length 19 [2021-06-05 04:56:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:18,887 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 819 transitions. [2021-06-05 04:56:18,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 819 transitions. [2021-06-05 04:56:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:18,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:18,888 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:18,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616 [2021-06-05 04:56:18,888 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash 877577794, now seen corresponding path program 42 times [2021-06-05 04:56:18,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:18,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712283097] [2021-06-05 04:56:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:18,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:18,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712283097] [2021-06-05 04:56:18,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712283097] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:18,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:18,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:18,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105686239] [2021-06-05 04:56:18,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:18,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:18,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:18,915 INFO L87 Difference]: Start difference. First operand 274 states and 819 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:18,982 INFO L93 Difference]: Finished difference Result 515 states and 1465 transitions. [2021-06-05 04:56:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:18,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:18,983 INFO L225 Difference]: With dead ends: 515 [2021-06-05 04:56:18,983 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 04:56:18,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 04:56:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 264. [2021-06-05 04:56:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0152091254752853) internal successors, (793), 263 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 793 transitions. [2021-06-05 04:56:18,987 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 793 transitions. Word has length 19 [2021-06-05 04:56:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:18,987 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 793 transitions. [2021-06-05 04:56:18,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 793 transitions. [2021-06-05 04:56:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:18,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:18,987 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:18,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617 [2021-06-05 04:56:18,987 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:18,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1591463139, now seen corresponding path program 41 times [2021-06-05 04:56:18,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:18,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255480455] [2021-06-05 04:56:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255480455] [2021-06-05 04:56:19,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255480455] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5505197] [2021-06-05 04:56:19,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,014 INFO L87 Difference]: Start difference. First operand 264 states and 793 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,096 INFO L93 Difference]: Finished difference Result 504 states and 1450 transitions. [2021-06-05 04:56:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,097 INFO L225 Difference]: With dead ends: 504 [2021-06-05 04:56:19,097 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:56:19,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:56:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 276. [2021-06-05 04:56:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.018181818181818) internal successors, (830), 275 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 830 transitions. [2021-06-05 04:56:19,100 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 830 transitions. Word has length 19 [2021-06-05 04:56:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,101 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 830 transitions. [2021-06-05 04:56:19,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 830 transitions. [2021-06-05 04:56:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,101 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618 [2021-06-05 04:56:19,101 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1320953447, now seen corresponding path program 42 times [2021-06-05 04:56:19,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659083668] [2021-06-05 04:56:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659083668] [2021-06-05 04:56:19,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659083668] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758464688] [2021-06-05 04:56:19,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,130 INFO L87 Difference]: Start difference. First operand 276 states and 830 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,217 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-06-05 04:56:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,218 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:56:19,218 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:56:19,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:56:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 261. [2021-06-05 04:56:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.0153846153846153) internal successors, (784), 260 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 784 transitions. [2021-06-05 04:56:19,221 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 784 transitions. Word has length 19 [2021-06-05 04:56:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,221 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 784 transitions. [2021-06-05 04:56:19,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 784 transitions. [2021-06-05 04:56:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619 [2021-06-05 04:56:19,222 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,222 INFO L82 PathProgramCache]: Analyzing trace with hash -549537380, now seen corresponding path program 43 times [2021-06-05 04:56:19,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238792331] [2021-06-05 04:56:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238792331] [2021-06-05 04:56:19,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238792331] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584237318] [2021-06-05 04:56:19,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,246 INFO L87 Difference]: Start difference. First operand 261 states and 784 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,312 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-06-05 04:56:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,313 INFO L225 Difference]: With dead ends: 407 [2021-06-05 04:56:19,313 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 04:56:19,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 04:56:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 265. [2021-06-05 04:56:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.992424242424242) internal successors, (790), 264 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 790 transitions. [2021-06-05 04:56:19,316 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 790 transitions. Word has length 19 [2021-06-05 04:56:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,316 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 790 transitions. [2021-06-05 04:56:19,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 790 transitions. [2021-06-05 04:56:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,316 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620 [2021-06-05 04:56:19,316 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1404112814, now seen corresponding path program 44 times [2021-06-05 04:56:19,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288932536] [2021-06-05 04:56:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288932536] [2021-06-05 04:56:19,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288932536] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765990758] [2021-06-05 04:56:19,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,343 INFO L87 Difference]: Start difference. First operand 265 states and 790 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,422 INFO L93 Difference]: Finished difference Result 430 states and 1198 transitions. [2021-06-05 04:56:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,422 INFO L225 Difference]: With dead ends: 430 [2021-06-05 04:56:19,422 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:56:19,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:56:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 275. [2021-06-05 04:56:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.9744525547445257) internal successors, (815), 274 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 815 transitions. [2021-06-05 04:56:19,426 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 815 transitions. Word has length 19 [2021-06-05 04:56:19,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,426 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 815 transitions. [2021-06-05 04:56:19,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 815 transitions. [2021-06-05 04:56:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,426 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621 [2021-06-05 04:56:19,426 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,426 INFO L82 PathProgramCache]: Analyzing trace with hash -986737450, now seen corresponding path program 45 times [2021-06-05 04:56:19,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448336399] [2021-06-05 04:56:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448336399] [2021-06-05 04:56:19,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448336399] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614579387] [2021-06-05 04:56:19,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,467 INFO L87 Difference]: Start difference. First operand 275 states and 815 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,543 INFO L93 Difference]: Finished difference Result 394 states and 1115 transitions. [2021-06-05 04:56:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,544 INFO L225 Difference]: With dead ends: 394 [2021-06-05 04:56:19,544 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 04:56:19,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 04:56:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 261. [2021-06-05 04:56:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.0) internal successors, (780), 260 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 780 transitions. [2021-06-05 04:56:19,547 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 780 transitions. Word has length 19 [2021-06-05 04:56:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,547 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 780 transitions. [2021-06-05 04:56:19,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 780 transitions. [2021-06-05 04:56:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,548 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622 [2021-06-05 04:56:19,548 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,548 INFO L82 PathProgramCache]: Analyzing trace with hash 879484852, now seen corresponding path program 46 times [2021-06-05 04:56:19,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590069852] [2021-06-05 04:56:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590069852] [2021-06-05 04:56:19,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590069852] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634009300] [2021-06-05 04:56:19,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,572 INFO L87 Difference]: Start difference. First operand 261 states and 780 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,627 INFO L93 Difference]: Finished difference Result 393 states and 1118 transitions. [2021-06-05 04:56:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,628 INFO L225 Difference]: With dead ends: 393 [2021-06-05 04:56:19,628 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 04:56:19,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 04:56:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 263. [2021-06-05 04:56:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.9885496183206106) internal successors, (783), 262 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 783 transitions. [2021-06-05 04:56:19,631 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 783 transitions. Word has length 19 [2021-06-05 04:56:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,631 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 783 transitions. [2021-06-05 04:56:19,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 783 transitions. [2021-06-05 04:56:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623 [2021-06-05 04:56:19,631 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash 199463632, now seen corresponding path program 47 times [2021-06-05 04:56:19,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442620647] [2021-06-05 04:56:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442620647] [2021-06-05 04:56:19,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442620647] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934271798] [2021-06-05 04:56:19,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,658 INFO L87 Difference]: Start difference. First operand 263 states and 783 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,745 INFO L93 Difference]: Finished difference Result 381 states and 1080 transitions. [2021-06-05 04:56:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,746 INFO L225 Difference]: With dead ends: 381 [2021-06-05 04:56:19,746 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 04:56:19,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 04:56:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 273. [2021-06-05 04:56:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.9705882352941178) internal successors, (808), 272 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 808 transitions. [2021-06-05 04:56:19,749 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 808 transitions. Word has length 19 [2021-06-05 04:56:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,749 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 808 transitions. [2021-06-05 04:56:19,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 808 transitions. [2021-06-05 04:56:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624 [2021-06-05 04:56:19,750 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2103580664, now seen corresponding path program 48 times [2021-06-05 04:56:19,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830705572] [2021-06-05 04:56:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830705572] [2021-06-05 04:56:19,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830705572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:19,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:19,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857050703] [2021-06-05 04:56:19,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:19,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:19,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:19,776 INFO L87 Difference]: Start difference. First operand 273 states and 808 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:19,857 INFO L93 Difference]: Finished difference Result 345 states and 997 transitions. [2021-06-05 04:56:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:19,858 INFO L225 Difference]: With dead ends: 345 [2021-06-05 04:56:19,858 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 04:56:19,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 04:56:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 257. [2021-06-05 04:56:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.015625) internal successors, (772), 256 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 772 transitions. [2021-06-05 04:56:19,861 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 772 transitions. Word has length 19 [2021-06-05 04:56:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:19,861 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 772 transitions. [2021-06-05 04:56:19,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 772 transitions. [2021-06-05 04:56:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:19,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:19,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:19,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625 [2021-06-05 04:56:19,862 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1070480311, now seen corresponding path program 43 times [2021-06-05 04:56:19,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:19,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819405706] [2021-06-05 04:56:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:19,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819405706] [2021-06-05 04:56:19,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819405706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:19,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123323233] [2021-06-05 04:56:19,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:19,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123323233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:19,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:19,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:19,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109543042] [2021-06-05 04:56:19,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:19,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:19,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:19,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:19,949 INFO L87 Difference]: Start difference. First operand 257 states and 772 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:20,029 INFO L93 Difference]: Finished difference Result 449 states and 1320 transitions. [2021-06-05 04:56:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:20,030 INFO L225 Difference]: With dead ends: 449 [2021-06-05 04:56:20,030 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:56:20,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:56:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 235. [2021-06-05 04:56:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.0213675213675213) internal successors, (707), 234 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 707 transitions. [2021-06-05 04:56:20,033 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 707 transitions. Word has length 19 [2021-06-05 04:56:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:20,033 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 707 transitions. [2021-06-05 04:56:20,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 707 transitions. [2021-06-05 04:56:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:20,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:20,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:20,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:20,245 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash 170307403, now seen corresponding path program 44 times [2021-06-05 04:56:20,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:20,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670439673] [2021-06-05 04:56:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:20,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:20,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670439673] [2021-06-05 04:56:20,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670439673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:20,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992145520] [2021-06-05 04:56:20,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:20,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:20,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:20,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:20,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992145520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:20,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:20,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:20,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424161125] [2021-06-05 04:56:20,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:20,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:20,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:20,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:20,348 INFO L87 Difference]: Start difference. First operand 235 states and 707 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:20,430 INFO L93 Difference]: Finished difference Result 437 states and 1251 transitions. [2021-06-05 04:56:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:20,431 INFO L225 Difference]: With dead ends: 437 [2021-06-05 04:56:20,431 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 04:56:20,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 04:56:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 241. [2021-06-05 04:56:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 3.004166666666667) internal successors, (721), 240 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 721 transitions. [2021-06-05 04:56:20,434 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 721 transitions. Word has length 19 [2021-06-05 04:56:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:20,434 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 721 transitions. [2021-06-05 04:56:20,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 721 transitions. [2021-06-05 04:56:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:20,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:20,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:20,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 04:56:20,650 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1045052217, now seen corresponding path program 45 times [2021-06-05 04:56:20,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:20,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26440494] [2021-06-05 04:56:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:20,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26440494] [2021-06-05 04:56:20,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26440494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917321016] [2021-06-05 04:56:20,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:20,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:20,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:20,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:20,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:20,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917321016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:20,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:20,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011828217] [2021-06-05 04:56:20,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:20,750 INFO L87 Difference]: Start difference. First operand 241 states and 721 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:20,838 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-06-05 04:56:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:20,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:20,839 INFO L225 Difference]: With dead ends: 415 [2021-06-05 04:56:20,839 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 04:56:20,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 04:56:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 214. [2021-06-05 04:56:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.0) internal successors, (639), 213 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 639 transitions. [2021-06-05 04:56:20,842 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 639 transitions. Word has length 19 [2021-06-05 04:56:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:20,842 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 639 transitions. [2021-06-05 04:56:20,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 639 transitions. [2021-06-05 04:56:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:20,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:20,842 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:21,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 04:56:21,057 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -990658535, now seen corresponding path program 46 times [2021-06-05 04:56:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038261638] [2021-06-05 04:56:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:21,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038261638] [2021-06-05 04:56:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038261638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560847689] [2021-06-05 04:56:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:21,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:21,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:21,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:21,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560847689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:21,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:21,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068395666] [2021-06-05 04:56:21,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:21,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:21,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:21,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:21,144 INFO L87 Difference]: Start difference. First operand 214 states and 639 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:21,220 INFO L93 Difference]: Finished difference Result 367 states and 1064 transitions. [2021-06-05 04:56:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:21,221 INFO L225 Difference]: With dead ends: 367 [2021-06-05 04:56:21,221 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 04:56:21,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 04:56:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 217. [2021-06-05 04:56:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.0) internal successors, (648), 216 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-06-05 04:56:21,224 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-06-05 04:56:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:21,224 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-06-05 04:56:21,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-06-05 04:56:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:21,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:21,224 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:21,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 04:56:21,424 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash -33107299, now seen corresponding path program 47 times [2021-06-05 04:56:21,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:21,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228467740] [2021-06-05 04:56:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228467740] [2021-06-05 04:56:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228467740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837219177] [2021-06-05 04:56:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:21,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:21,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:21,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837219177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:21,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:21,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213581786] [2021-06-05 04:56:21,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:21,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:21,523 INFO L87 Difference]: Start difference. First operand 217 states and 648 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:21,602 INFO L93 Difference]: Finished difference Result 355 states and 1025 transitions. [2021-06-05 04:56:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:21,602 INFO L225 Difference]: With dead ends: 355 [2021-06-05 04:56:21,602 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 04:56:21,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 04:56:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 229. [2021-06-05 04:56:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.013157894736842) internal successors, (687), 228 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 687 transitions. [2021-06-05 04:56:21,605 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 687 transitions. Word has length 19 [2021-06-05 04:56:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:21,605 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 687 transitions. [2021-06-05 04:56:21,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 687 transitions. [2021-06-05 04:56:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:21,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:21,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:21,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:21,806 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1248466919, now seen corresponding path program 48 times [2021-06-05 04:56:21,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:21,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731998484] [2021-06-05 04:56:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:21,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731998484] [2021-06-05 04:56:21,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731998484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065820418] [2021-06-05 04:56:21,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:21,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:21,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:21,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065820418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:21,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:21,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951048518] [2021-06-05 04:56:21,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:21,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:21,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:21,919 INFO L87 Difference]: Start difference. First operand 229 states and 687 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:22,006 INFO L93 Difference]: Finished difference Result 320 states and 940 transitions. [2021-06-05 04:56:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:22,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:22,007 INFO L225 Difference]: With dead ends: 320 [2021-06-05 04:56:22,007 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 04:56:22,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 04:56:22,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 215. [2021-06-05 04:56:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0046728971962615) internal successors, (643), 214 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 643 transitions. [2021-06-05 04:56:22,009 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 643 transitions. Word has length 19 [2021-06-05 04:56:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:22,009 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 643 transitions. [2021-06-05 04:56:22,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 643 transitions. [2021-06-05 04:56:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:22,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:22,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:22,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:22,210 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:22,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1006159271, now seen corresponding path program 49 times [2021-06-05 04:56:22,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:22,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588989234] [2021-06-05 04:56:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:22,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:22,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588989234] [2021-06-05 04:56:22,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588989234] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:22,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:22,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:22,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218983112] [2021-06-05 04:56:22,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:22,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:22,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:22,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:22,237 INFO L87 Difference]: Start difference. First operand 215 states and 643 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:22,325 INFO L93 Difference]: Finished difference Result 361 states and 1031 transitions. [2021-06-05 04:56:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:22,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:22,326 INFO L225 Difference]: With dead ends: 361 [2021-06-05 04:56:22,326 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 04:56:22,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 04:56:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 233. [2021-06-05 04:56:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.9956896551724137) internal successors, (695), 232 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 695 transitions. [2021-06-05 04:56:22,329 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 695 transitions. Word has length 19 [2021-06-05 04:56:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:22,329 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 695 transitions. [2021-06-05 04:56:22,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 695 transitions. [2021-06-05 04:56:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:22,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:22,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:22,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638 [2021-06-05 04:56:22,329 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1386896911, now seen corresponding path program 50 times [2021-06-05 04:56:22,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:22,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275737647] [2021-06-05 04:56:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:22,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:22,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275737647] [2021-06-05 04:56:22,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275737647] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:22,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:22,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:22,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447622116] [2021-06-05 04:56:22,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:22,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:22,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:22,355 INFO L87 Difference]: Start difference. First operand 233 states and 695 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:22,457 INFO L93 Difference]: Finished difference Result 359 states and 1026 transitions. [2021-06-05 04:56:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:22,458 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:56:22,458 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 04:56:22,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 04:56:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 231. [2021-06-05 04:56:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.991304347826087) internal successors, (688), 230 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-06-05 04:56:22,460 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 19 [2021-06-05 04:56:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:22,461 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-06-05 04:56:22,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-06-05 04:56:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:22,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:22,461 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:22,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639 [2021-06-05 04:56:22,461 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1984233569, now seen corresponding path program 51 times [2021-06-05 04:56:22,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:22,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898658128] [2021-06-05 04:56:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:22,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:22,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898658128] [2021-06-05 04:56:22,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898658128] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:22,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:22,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:22,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129569948] [2021-06-05 04:56:22,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:22,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:22,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:22,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:22,486 INFO L87 Difference]: Start difference. First operand 231 states and 688 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:22,578 INFO L93 Difference]: Finished difference Result 373 states and 1067 transitions. [2021-06-05 04:56:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:22,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:22,579 INFO L225 Difference]: With dead ends: 373 [2021-06-05 04:56:22,579 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:56:22,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:56:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 04:56:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.991228070175439) internal successors, (682), 228 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-06-05 04:56:22,585 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 19 [2021-06-05 04:56:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:22,585 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-06-05 04:56:22,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-06-05 04:56:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:22,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:22,585 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:22,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640 [2021-06-05 04:56:22,586 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:22,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1454990024, now seen corresponding path program 49 times [2021-06-05 04:56:22,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:22,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476981589] [2021-06-05 04:56:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:22,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:22,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476981589] [2021-06-05 04:56:22,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476981589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:22,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54078697] [2021-06-05 04:56:22,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:22,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54078697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:22,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:22,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:22,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640764443] [2021-06-05 04:56:22,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:22,703 INFO L87 Difference]: Start difference. First operand 229 states and 682 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:22,785 INFO L93 Difference]: Finished difference Result 461 states and 1330 transitions. [2021-06-05 04:56:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:22,786 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:56:22,786 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 04:56:22,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 04:56:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 235. [2021-06-05 04:56:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.017094017094017) internal successors, (706), 234 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 706 transitions. [2021-06-05 04:56:22,789 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 706 transitions. Word has length 19 [2021-06-05 04:56:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:22,789 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 706 transitions. [2021-06-05 04:56:22,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 706 transitions. [2021-06-05 04:56:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:22,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:22,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:22,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 04:56:22,990 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:22,990 INFO L82 PathProgramCache]: Analyzing trace with hash -524828848, now seen corresponding path program 50 times [2021-06-05 04:56:22,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:22,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464921093] [2021-06-05 04:56:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:23,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:23,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464921093] [2021-06-05 04:56:23,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464921093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:23,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465508142] [2021-06-05 04:56:23,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:23,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:23,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:23,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:23,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:23,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465508142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:23,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:23,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:23,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741845469] [2021-06-05 04:56:23,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:23,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:23,161 INFO L87 Difference]: Start difference. First operand 235 states and 706 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:23,237 INFO L93 Difference]: Finished difference Result 467 states and 1339 transitions. [2021-06-05 04:56:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:23,238 INFO L225 Difference]: With dead ends: 467 [2021-06-05 04:56:23,238 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 04:56:23,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 04:56:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 232. [2021-06-05 04:56:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.0043290043290045) internal successors, (694), 231 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 694 transitions. [2021-06-05 04:56:23,242 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 694 transitions. Word has length 19 [2021-06-05 04:56:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:23,242 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 694 transitions. [2021-06-05 04:56:23,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 694 transitions. [2021-06-05 04:56:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:23,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:23,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:23,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 04:56:23,456 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1537521380, now seen corresponding path program 51 times [2021-06-05 04:56:23,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:23,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030987182] [2021-06-05 04:56:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:23,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:23,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030987182] [2021-06-05 04:56:23,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030987182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:23,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938001929] [2021-06-05 04:56:23,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:23,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:23,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:23,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938001929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:23,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:23,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492356687] [2021-06-05 04:56:23,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:23,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:23,555 INFO L87 Difference]: Start difference. First operand 232 states and 694 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:23,624 INFO L93 Difference]: Finished difference Result 458 states and 1306 transitions. [2021-06-05 04:56:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:23,625 INFO L225 Difference]: With dead ends: 458 [2021-06-05 04:56:23,625 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:56:23,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:56:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 230. [2021-06-05 04:56:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.995633187772926) internal successors, (686), 229 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 686 transitions. [2021-06-05 04:56:23,630 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 686 transitions. Word has length 19 [2021-06-05 04:56:23,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:23,630 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 686 transitions. [2021-06-05 04:56:23,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 686 transitions. [2021-06-05 04:56:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:23,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:23,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:23,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:23,841 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash 242250915, now seen corresponding path program 52 times [2021-06-05 04:56:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:23,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877628750] [2021-06-05 04:56:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:23,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:23,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877628750] [2021-06-05 04:56:23,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877628750] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:23,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:23,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:23,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374694250] [2021-06-05 04:56:23,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:23,894 INFO L87 Difference]: Start difference. First operand 230 states and 686 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:23,993 INFO L93 Difference]: Finished difference Result 403 states and 1125 transitions. [2021-06-05 04:56:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:23,994 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:56:23,994 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 04:56:23,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 04:56:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 242. [2021-06-05 04:56:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.037344398340249) internal successors, (732), 241 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 732 transitions. [2021-06-05 04:56:23,997 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 732 transitions. Word has length 19 [2021-06-05 04:56:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:23,998 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 732 transitions. [2021-06-05 04:56:23,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 732 transitions. [2021-06-05 04:56:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:23,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:23,998 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:23,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648 [2021-06-05 04:56:23,998 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:23,998 INFO L82 PathProgramCache]: Analyzing trace with hash 622988555, now seen corresponding path program 53 times [2021-06-05 04:56:23,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:23,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702166190] [2021-06-05 04:56:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:24,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702166190] [2021-06-05 04:56:24,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702166190] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:24,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:24,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:24,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978315236] [2021-06-05 04:56:24,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:24,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:24,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:24,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:24,026 INFO L87 Difference]: Start difference. First operand 242 states and 732 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:24,124 INFO L93 Difference]: Finished difference Result 409 states and 1140 transitions. [2021-06-05 04:56:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:24,125 INFO L225 Difference]: With dead ends: 409 [2021-06-05 04:56:24,125 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 04:56:24,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 04:56:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 244. [2021-06-05 04:56:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.02880658436214) internal successors, (736), 243 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 736 transitions. [2021-06-05 04:56:24,128 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 736 transitions. Word has length 19 [2021-06-05 04:56:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:24,128 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 736 transitions. [2021-06-05 04:56:24,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 736 transitions. [2021-06-05 04:56:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:24,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:24,128 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:24,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649 [2021-06-05 04:56:24,128 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:24,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2120353452, now seen corresponding path program 52 times [2021-06-05 04:56:24,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:24,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895565112] [2021-06-05 04:56:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:24,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:24,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895565112] [2021-06-05 04:56:24,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895565112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:24,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603160955] [2021-06-05 04:56:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:24,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:24,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:24,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603160955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:24,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:24,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:24,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798798997] [2021-06-05 04:56:24,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:24,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:24,255 INFO L87 Difference]: Start difference. First operand 244 states and 736 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:24,356 INFO L93 Difference]: Finished difference Result 532 states and 1524 transitions. [2021-06-05 04:56:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:24,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:24,357 INFO L225 Difference]: With dead ends: 532 [2021-06-05 04:56:24,357 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 04:56:24,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 04:56:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 250. [2021-06-05 04:56:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0642570281124497) internal successors, (763), 249 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 763 transitions. [2021-06-05 04:56:24,374 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 763 transitions. Word has length 19 [2021-06-05 04:56:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:24,374 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 763 transitions. [2021-06-05 04:56:24,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 763 transitions. [2021-06-05 04:56:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:24,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:24,388 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:24,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 04:56:24,604 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:24,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1190192276, now seen corresponding path program 53 times [2021-06-05 04:56:24,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:24,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457345595] [2021-06-05 04:56:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:24,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:24,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457345595] [2021-06-05 04:56:24,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457345595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:24,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896169315] [2021-06-05 04:56:24,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:24,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:24,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:24,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:24,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896169315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:24,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:24,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:24,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807816305] [2021-06-05 04:56:24,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:24,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:24,719 INFO L87 Difference]: Start difference. First operand 250 states and 763 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:24,797 INFO L93 Difference]: Finished difference Result 514 states and 1455 transitions. [2021-06-05 04:56:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:24,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:24,798 INFO L225 Difference]: With dead ends: 514 [2021-06-05 04:56:24,798 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 04:56:24,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 04:56:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 249. [2021-06-05 04:56:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.056451612903226) internal successors, (758), 248 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 758 transitions. [2021-06-05 04:56:24,801 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 758 transitions. Word has length 19 [2021-06-05 04:56:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:24,801 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 758 transitions. [2021-06-05 04:56:24,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:24,801 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 758 transitions. [2021-06-05 04:56:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:24,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:24,802 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:25,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 04:56:25,002 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:25,002 INFO L82 PathProgramCache]: Analyzing trace with hash 38116775, now seen corresponding path program 54 times [2021-06-05 04:56:25,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:25,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192693505] [2021-06-05 04:56:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:25,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192693505] [2021-06-05 04:56:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192693505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460104241] [2021-06-05 04:56:25,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:25,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:25,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:25,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:25,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460104241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:25,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:25,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307256733] [2021-06-05 04:56:25,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:25,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:25,114 INFO L87 Difference]: Start difference. First operand 249 states and 758 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:25,198 INFO L93 Difference]: Finished difference Result 375 states and 1066 transitions. [2021-06-05 04:56:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:25,199 INFO L225 Difference]: With dead ends: 375 [2021-06-05 04:56:25,199 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:56:25,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:56:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 249. [2021-06-05 04:56:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.068548387096774) internal successors, (761), 248 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 761 transitions. [2021-06-05 04:56:25,202 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 761 transitions. Word has length 19 [2021-06-05 04:56:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:25,202 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 761 transitions. [2021-06-05 04:56:25,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 761 transitions. [2021-06-05 04:56:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:25,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:25,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:25,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 04:56:25,403 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1919953796, now seen corresponding path program 54 times [2021-06-05 04:56:25,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:25,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182491513] [2021-06-05 04:56:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:25,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182491513] [2021-06-05 04:56:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182491513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700172728] [2021-06-05 04:56:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:25,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:56:25,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:25,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700172728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:25,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:25,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:25,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264918346] [2021-06-05 04:56:25,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:25,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:25,520 INFO L87 Difference]: Start difference. First operand 249 states and 761 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:25,606 INFO L93 Difference]: Finished difference Result 459 states and 1316 transitions. [2021-06-05 04:56:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:25,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:25,607 INFO L225 Difference]: With dead ends: 459 [2021-06-05 04:56:25,607 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 04:56:25,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 04:56:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 240. [2021-06-05 04:56:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.0585774058577404) internal successors, (731), 239 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 731 transitions. [2021-06-05 04:56:25,610 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 731 transitions. Word has length 19 [2021-06-05 04:56:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:25,611 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 731 transitions. [2021-06-05 04:56:25,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 731 transitions. [2021-06-05 04:56:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:25,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:25,611 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:25,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 04:56:25,811 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2001194468, now seen corresponding path program 55 times [2021-06-05 04:56:25,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:25,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511381492] [2021-06-05 04:56:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:25,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:25,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511381492] [2021-06-05 04:56:25,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511381492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:25,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237038337] [2021-06-05 04:56:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:25,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237038337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:25,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:25,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384391192] [2021-06-05 04:56:25,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:25,930 INFO L87 Difference]: Start difference. First operand 240 states and 731 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:26,014 INFO L93 Difference]: Finished difference Result 414 states and 1188 transitions. [2021-06-05 04:56:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:26,015 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:56:26,015 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 04:56:26,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 04:56:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 240. [2021-06-05 04:56:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.0418410041841004) internal successors, (727), 239 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 727 transitions. [2021-06-05 04:56:26,018 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 727 transitions. Word has length 19 [2021-06-05 04:56:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:26,018 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 727 transitions. [2021-06-05 04:56:26,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 727 transitions. [2021-06-05 04:56:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:26,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:26,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:26,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable658 [2021-06-05 04:56:26,219 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash 318111335, now seen corresponding path program 55 times [2021-06-05 04:56:26,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:26,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204597114] [2021-06-05 04:56:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204597114] [2021-06-05 04:56:26,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204597114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:26,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503254341] [2021-06-05 04:56:26,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503254341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:26,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:26,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:26,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847999391] [2021-06-05 04:56:26,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:26,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:26,342 INFO L87 Difference]: Start difference. First operand 240 states and 727 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:26,449 INFO L93 Difference]: Finished difference Result 347 states and 1016 transitions. [2021-06-05 04:56:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:26,449 INFO L225 Difference]: With dead ends: 347 [2021-06-05 04:56:26,449 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:56:26,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:56:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 236. [2021-06-05 04:56:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.0425531914893615) internal successors, (715), 235 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 715 transitions. [2021-06-05 04:56:26,452 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 715 transitions. Word has length 19 [2021-06-05 04:56:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:26,452 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 715 transitions. [2021-06-05 04:56:26,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 715 transitions. [2021-06-05 04:56:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:26,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:26,453 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:26,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:26,653 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1377350628, now seen corresponding path program 56 times [2021-06-05 04:56:26,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:26,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173441031] [2021-06-05 04:56:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:26,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173441031] [2021-06-05 04:56:26,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173441031] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:26,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:26,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:26,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757845593] [2021-06-05 04:56:26,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:26,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:26,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:26,687 INFO L87 Difference]: Start difference. First operand 236 states and 715 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:26,767 INFO L93 Difference]: Finished difference Result 452 states and 1270 transitions. [2021-06-05 04:56:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:26,768 INFO L225 Difference]: With dead ends: 452 [2021-06-05 04:56:26,768 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:56:26,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:56:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 246. [2021-06-05 04:56:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.020408163265306) internal successors, (740), 245 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 740 transitions. [2021-06-05 04:56:26,772 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 740 transitions. Word has length 19 [2021-06-05 04:56:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:26,772 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 740 transitions. [2021-06-05 04:56:26,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 740 transitions. [2021-06-05 04:56:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:26,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:26,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:26,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662 [2021-06-05 04:56:26,772 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1815702516, now seen corresponding path program 57 times [2021-06-05 04:56:26,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:26,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721012382] [2021-06-05 04:56:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:26,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721012382] [2021-06-05 04:56:26,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721012382] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:26,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:26,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:26,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951374602] [2021-06-05 04:56:26,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:26,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:26,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:26,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:26,800 INFO L87 Difference]: Start difference. First operand 246 states and 740 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:26,870 INFO L93 Difference]: Finished difference Result 416 states and 1187 transitions. [2021-06-05 04:56:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:26,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:26,870 INFO L225 Difference]: With dead ends: 416 [2021-06-05 04:56:26,871 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 04:56:26,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 04:56:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 236. [2021-06-05 04:56:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.0382978723404257) internal successors, (714), 235 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 714 transitions. [2021-06-05 04:56:26,874 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 714 transitions. Word has length 19 [2021-06-05 04:56:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:26,874 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 714 transitions. [2021-06-05 04:56:26,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 714 transitions. [2021-06-05 04:56:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:26,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:26,874 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:26,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable663 [2021-06-05 04:56:26,877 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:26,878 INFO L82 PathProgramCache]: Analyzing trace with hash -653338417, now seen corresponding path program 56 times [2021-06-05 04:56:26,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:26,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800204148] [2021-06-05 04:56:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:26,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800204148] [2021-06-05 04:56:26,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800204148] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:26,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:26,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:26,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070197068] [2021-06-05 04:56:26,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:26,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:26,931 INFO L87 Difference]: Start difference. First operand 236 states and 714 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,045 INFO L93 Difference]: Finished difference Result 388 states and 1108 transitions. [2021-06-05 04:56:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,045 INFO L225 Difference]: With dead ends: 388 [2021-06-05 04:56:27,045 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 04:56:27,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 04:56:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 248. [2021-06-05 04:56:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0404858299595143) internal successors, (751), 247 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 751 transitions. [2021-06-05 04:56:27,048 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 751 transitions. Word has length 19 [2021-06-05 04:56:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,048 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 751 transitions. [2021-06-05 04:56:27,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 751 transitions. [2021-06-05 04:56:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,049 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable664 [2021-06-05 04:56:27,049 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash -382828725, now seen corresponding path program 57 times [2021-06-05 04:56:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551361705] [2021-06-05 04:56:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551361705] [2021-06-05 04:56:27,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551361705] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819731391] [2021-06-05 04:56:27,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,088 INFO L87 Difference]: Start difference. First operand 248 states and 751 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,197 INFO L93 Difference]: Finished difference Result 366 states and 1071 transitions. [2021-06-05 04:56:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,198 INFO L225 Difference]: With dead ends: 366 [2021-06-05 04:56:27,198 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:56:27,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:56:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 235. [2021-06-05 04:56:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.0384615384615383) internal successors, (711), 234 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 711 transitions. [2021-06-05 04:56:27,201 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 711 transitions. Word has length 19 [2021-06-05 04:56:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,201 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 711 transitions. [2021-06-05 04:56:27,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 711 transitions. [2021-06-05 04:56:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,201 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665 [2021-06-05 04:56:27,201 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1250504300, now seen corresponding path program 58 times [2021-06-05 04:56:27,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973180711] [2021-06-05 04:56:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973180711] [2021-06-05 04:56:27,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973180711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676056497] [2021-06-05 04:56:27,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,228 INFO L87 Difference]: Start difference. First operand 235 states and 711 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,288 INFO L93 Difference]: Finished difference Result 391 states and 1119 transitions. [2021-06-05 04:56:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,289 INFO L225 Difference]: With dead ends: 391 [2021-06-05 04:56:27,289 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 04:56:27,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 04:56:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 237. [2021-06-05 04:56:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 3.0254237288135593) internal successors, (714), 236 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 714 transitions. [2021-06-05 04:56:27,292 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 714 transitions. Word has length 19 [2021-06-05 04:56:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,292 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 714 transitions. [2021-06-05 04:56:27,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 714 transitions. [2021-06-05 04:56:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,292 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666 [2021-06-05 04:56:27,292 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1644682960, now seen corresponding path program 59 times [2021-06-05 04:56:27,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551088494] [2021-06-05 04:56:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551088494] [2021-06-05 04:56:27,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551088494] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062733368] [2021-06-05 04:56:27,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,319 INFO L87 Difference]: Start difference. First operand 237 states and 714 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,388 INFO L93 Difference]: Finished difference Result 379 states and 1081 transitions. [2021-06-05 04:56:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,389 INFO L225 Difference]: With dead ends: 379 [2021-06-05 04:56:27,389 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 04:56:27,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 04:56:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 247. [2021-06-05 04:56:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 3.0040650406504064) internal successors, (739), 246 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 739 transitions. [2021-06-05 04:56:27,392 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 739 transitions. Word has length 19 [2021-06-05 04:56:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,392 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 739 transitions. [2021-06-05 04:56:27,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 739 transitions. [2021-06-05 04:56:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,392 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667 [2021-06-05 04:56:27,392 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash 542768808, now seen corresponding path program 60 times [2021-06-05 04:56:27,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154427774] [2021-06-05 04:56:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154427774] [2021-06-05 04:56:27,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154427774] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709003960] [2021-06-05 04:56:27,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,420 INFO L87 Difference]: Start difference. First operand 247 states and 739 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,475 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-06-05 04:56:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,476 INFO L225 Difference]: With dead ends: 343 [2021-06-05 04:56:27,476 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 04:56:27,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 04:56:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 235. [2021-06-05 04:56:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.034188034188034) internal successors, (710), 234 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 710 transitions. [2021-06-05 04:56:27,479 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 710 transitions. Word has length 19 [2021-06-05 04:56:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,479 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 710 transitions. [2021-06-05 04:56:27,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 710 transitions. [2021-06-05 04:56:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,479 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668 [2021-06-05 04:56:27,479 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1072803101, now seen corresponding path program 58 times [2021-06-05 04:56:27,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385865777] [2021-06-05 04:56:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385865777] [2021-06-05 04:56:27,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385865777] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846506710] [2021-06-05 04:56:27,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,505 INFO L87 Difference]: Start difference. First operand 235 states and 710 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,595 INFO L93 Difference]: Finished difference Result 325 states and 939 transitions. [2021-06-05 04:56:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,596 INFO L225 Difference]: With dead ends: 325 [2021-06-05 04:56:27,596 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 04:56:27,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 04:56:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 235. [2021-06-05 04:56:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.02991452991453) internal successors, (709), 234 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 709 transitions. [2021-06-05 04:56:27,598 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 709 transitions. Word has length 19 [2021-06-05 04:56:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,599 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 709 transitions. [2021-06-05 04:56:27,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 709 transitions. [2021-06-05 04:56:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669 [2021-06-05 04:56:27,599 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2138427743, now seen corresponding path program 59 times [2021-06-05 04:56:27,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596537045] [2021-06-05 04:56:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596537045] [2021-06-05 04:56:27,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596537045] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942685969] [2021-06-05 04:56:27,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,629 INFO L87 Difference]: Start difference. First operand 235 states and 709 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,726 INFO L93 Difference]: Finished difference Result 329 states and 951 transitions. [2021-06-05 04:56:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,727 INFO L225 Difference]: With dead ends: 329 [2021-06-05 04:56:27,727 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 04:56:27,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 04:56:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-06-05 04:56:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 3.0125) internal successors, (723), 240 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 723 transitions. [2021-06-05 04:56:27,730 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 723 transitions. Word has length 19 [2021-06-05 04:56:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,730 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 723 transitions. [2021-06-05 04:56:27,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 723 transitions. [2021-06-05 04:56:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,730 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670 [2021-06-05 04:56:27,730 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1867918051, now seen corresponding path program 60 times [2021-06-05 04:56:27,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440724507] [2021-06-05 04:56:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440724507] [2021-06-05 04:56:27,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440724507] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499216691] [2021-06-05 04:56:27,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,761 INFO L87 Difference]: Start difference. First operand 241 states and 723 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,858 INFO L93 Difference]: Finished difference Result 294 states and 876 transitions. [2021-06-05 04:56:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,859 INFO L225 Difference]: With dead ends: 294 [2021-06-05 04:56:27,859 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 04:56:27,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 04:56:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 217. [2021-06-05 04:56:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.009259259259259) internal successors, (650), 216 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 650 transitions. [2021-06-05 04:56:27,861 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 650 transitions. Word has length 19 [2021-06-05 04:56:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,861 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 650 transitions. [2021-06-05 04:56:27,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 650 transitions. [2021-06-05 04:56:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671 [2021-06-05 04:56:27,862 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1028896921, now seen corresponding path program 61 times [2021-06-05 04:56:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468243351] [2021-06-05 04:56:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468243351] [2021-06-05 04:56:27,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468243351] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505113348] [2021-06-05 04:56:27,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,886 INFO L87 Difference]: Start difference. First operand 217 states and 650 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:27,944 INFO L93 Difference]: Finished difference Result 362 states and 1019 transitions. [2021-06-05 04:56:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:27,944 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:56:27,944 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 04:56:27,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 04:56:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 219. [2021-06-05 04:56:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9954128440366974) internal successors, (653), 218 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 653 transitions. [2021-06-05 04:56:27,947 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 653 transitions. Word has length 19 [2021-06-05 04:56:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:27,947 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 653 transitions. [2021-06-05 04:56:27,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 653 transitions. [2021-06-05 04:56:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:27,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:27,947 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:27,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672 [2021-06-05 04:56:27,948 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash 493077425, now seen corresponding path program 62 times [2021-06-05 04:56:27,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:27,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541796614] [2021-06-05 04:56:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:27,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:27,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541796614] [2021-06-05 04:56:27,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541796614] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:27,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:27,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:27,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57806780] [2021-06-05 04:56:27,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:27,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:27,974 INFO L87 Difference]: Start difference. First operand 219 states and 653 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:28,053 INFO L93 Difference]: Finished difference Result 391 states and 1075 transitions. [2021-06-05 04:56:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:28,053 INFO L225 Difference]: With dead ends: 391 [2021-06-05 04:56:28,054 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 04:56:28,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 04:56:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 231. [2021-06-05 04:56:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.9695652173913043) internal successors, (683), 230 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-06-05 04:56:28,056 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-06-05 04:56:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:28,057 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-06-05 04:56:28,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-06-05 04:56:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:28,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:28,057 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:28,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673 [2021-06-05 04:56:28,057 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 873815065, now seen corresponding path program 63 times [2021-06-05 04:56:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:28,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432093600] [2021-06-05 04:56:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432093600] [2021-06-05 04:56:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432093600] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:28,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:28,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173047623] [2021-06-05 04:56:28,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:28,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:28,090 INFO L87 Difference]: Start difference. First operand 231 states and 683 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:28,164 INFO L93 Difference]: Finished difference Result 354 states and 997 transitions. [2021-06-05 04:56:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:28,165 INFO L225 Difference]: With dead ends: 354 [2021-06-05 04:56:28,165 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 04:56:28,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 04:56:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 217. [2021-06-05 04:56:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.0) internal successors, (648), 216 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-06-05 04:56:28,170 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-06-05 04:56:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:28,170 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-06-05 04:56:28,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-06-05 04:56:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:28,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:28,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:28,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674 [2021-06-05 04:56:28,171 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1196865479, now seen corresponding path program 64 times [2021-06-05 04:56:28,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:28,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958125659] [2021-06-05 04:56:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958125659] [2021-06-05 04:56:28,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958125659] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:28,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:28,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123043886] [2021-06-05 04:56:28,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:28,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:28,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:28,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:28,197 INFO L87 Difference]: Start difference. First operand 217 states and 648 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:28,272 INFO L93 Difference]: Finished difference Result 397 states and 1090 transitions. [2021-06-05 04:56:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:28,273 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:56:28,273 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 04:56:28,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 04:56:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 233. [2021-06-05 04:56:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.9741379310344827) internal successors, (690), 232 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 690 transitions. [2021-06-05 04:56:28,276 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 690 transitions. Word has length 19 [2021-06-05 04:56:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:28,276 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 690 transitions. [2021-06-05 04:56:28,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 690 transitions. [2021-06-05 04:56:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:28,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:28,276 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:28,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable675 [2021-06-05 04:56:28,276 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash -816127839, now seen corresponding path program 65 times [2021-06-05 04:56:28,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:28,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755218467] [2021-06-05 04:56:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:28,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755218467] [2021-06-05 04:56:28,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755218467] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:28,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:28,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:28,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931193619] [2021-06-05 04:56:28,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:28,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:28,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:28,303 INFO L87 Difference]: Start difference. First operand 233 states and 690 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:28,381 INFO L93 Difference]: Finished difference Result 395 states and 1085 transitions. [2021-06-05 04:56:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:28,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:28,382 INFO L225 Difference]: With dead ends: 395 [2021-06-05 04:56:28,382 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 04:56:28,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 04:56:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 231. [2021-06-05 04:56:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.9695652173913043) internal successors, (683), 230 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-06-05 04:56:28,385 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-06-05 04:56:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:28,385 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-06-05 04:56:28,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-06-05 04:56:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:28,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:28,386 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:28,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676 [2021-06-05 04:56:28,386 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -218791181, now seen corresponding path program 66 times [2021-06-05 04:56:28,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:28,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022936783] [2021-06-05 04:56:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:28,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022936783] [2021-06-05 04:56:28,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022936783] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:28,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:28,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:28,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871031720] [2021-06-05 04:56:28,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:28,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:28,422 INFO L87 Difference]: Start difference. First operand 231 states and 683 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:28,504 INFO L93 Difference]: Finished difference Result 358 states and 1005 transitions. [2021-06-05 04:56:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:28,505 INFO L225 Difference]: With dead ends: 358 [2021-06-05 04:56:28,505 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 04:56:28,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 04:56:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 215. [2021-06-05 04:56:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0093457943925235) internal successors, (644), 214 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-06-05 04:56:28,507 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-06-05 04:56:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:28,507 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-06-05 04:56:28,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-06-05 04:56:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:28,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:28,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:28,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677 [2021-06-05 04:56:28,508 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash 313632770, now seen corresponding path program 61 times [2021-06-05 04:56:28,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:28,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181314581] [2021-06-05 04:56:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181314581] [2021-06-05 04:56:28,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181314581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269606128] [2021-06-05 04:56:28,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:28,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269606128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:28,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:28,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:28,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416452244] [2021-06-05 04:56:28,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:28,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:28,598 INFO L87 Difference]: Start difference. First operand 215 states and 644 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:28,673 INFO L93 Difference]: Finished difference Result 390 states and 1140 transitions. [2021-06-05 04:56:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:28,674 INFO L225 Difference]: With dead ends: 390 [2021-06-05 04:56:28,674 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:56:28,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:56:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 218. [2021-06-05 04:56:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0092165898617513) internal successors, (653), 217 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 653 transitions. [2021-06-05 04:56:28,680 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 653 transitions. Word has length 19 [2021-06-05 04:56:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:28,680 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 653 transitions. [2021-06-05 04:56:28,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 653 transitions. [2021-06-05 04:56:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:28,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:28,680 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:28,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-05 04:56:28,881 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash 157800938, now seen corresponding path program 62 times [2021-06-05 04:56:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:28,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408431072] [2021-06-05 04:56:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:28,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408431072] [2021-06-05 04:56:28,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408431072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:28,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054754810] [2021-06-05 04:56:28,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:28,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:28,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:28,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054754810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:28,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:28,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:28,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586431778] [2021-06-05 04:56:28,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:28,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:28,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:28,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:28,975 INFO L87 Difference]: Start difference. First operand 218 states and 653 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:29,058 INFO L93 Difference]: Finished difference Result 453 states and 1308 transitions. [2021-06-05 04:56:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:29,059 INFO L225 Difference]: With dead ends: 453 [2021-06-05 04:56:29,059 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 04:56:29,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 04:56:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 221. [2021-06-05 04:56:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.022727272727273) internal successors, (665), 220 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 665 transitions. [2021-06-05 04:56:29,062 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 665 transitions. Word has length 19 [2021-06-05 04:56:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:29,062 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 665 transitions. [2021-06-05 04:56:29,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 665 transitions. [2021-06-05 04:56:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:29,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:29,062 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:29,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:29,263 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1087962114, now seen corresponding path program 63 times [2021-06-05 04:56:29,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:29,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247938634] [2021-06-05 04:56:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:29,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:29,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247938634] [2021-06-05 04:56:29,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247938634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:29,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419175993] [2021-06-05 04:56:29,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:29,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:29,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:29,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419175993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:29,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:29,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:29,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121004404] [2021-06-05 04:56:29,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:29,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:29,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:29,352 INFO L87 Difference]: Start difference. First operand 221 states and 665 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:29,435 INFO L93 Difference]: Finished difference Result 399 states and 1161 transitions. [2021-06-05 04:56:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:29,435 INFO L225 Difference]: With dead ends: 399 [2021-06-05 04:56:29,436 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 04:56:29,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 04:56:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 215. [2021-06-05 04:56:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0093457943925235) internal successors, (644), 214 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-06-05 04:56:29,438 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-06-05 04:56:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:29,438 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-06-05 04:56:29,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-06-05 04:56:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:29,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:29,439 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:29,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:29,639 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash -727997342, now seen corresponding path program 64 times [2021-06-05 04:56:29,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:29,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887461301] [2021-06-05 04:56:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:29,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:29,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887461301] [2021-06-05 04:56:29,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887461301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:29,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789045898] [2021-06-05 04:56:29,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:29,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:29,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:29,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789045898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:29,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:29,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:29,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028464688] [2021-06-05 04:56:29,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:29,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:29,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:29,743 INFO L87 Difference]: Start difference. First operand 215 states and 644 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:29,827 INFO L93 Difference]: Finished difference Result 423 states and 1218 transitions. [2021-06-05 04:56:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:29,828 INFO L225 Difference]: With dead ends: 423 [2021-06-05 04:56:29,828 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 04:56:29,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 04:56:29,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 221. [2021-06-05 04:56:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.036363636363636) internal successors, (668), 220 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 668 transitions. [2021-06-05 04:56:29,831 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 668 transitions. Word has length 19 [2021-06-05 04:56:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:29,831 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 668 transitions. [2021-06-05 04:56:29,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 668 transitions. [2021-06-05 04:56:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:29,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:29,832 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:30,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 04:56:30,032 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash 202163834, now seen corresponding path program 65 times [2021-06-05 04:56:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:30,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597442562] [2021-06-05 04:56:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:30,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597442562] [2021-06-05 04:56:30,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597442562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620871647] [2021-06-05 04:56:30,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:30,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:30,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:30,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:30,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620871647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:30,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:30,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:30,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332439729] [2021-06-05 04:56:30,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:30,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:30,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:30,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:30,130 INFO L87 Difference]: Start difference. First operand 221 states and 668 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:30,210 INFO L93 Difference]: Finished difference Result 429 states and 1227 transitions. [2021-06-05 04:56:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:30,211 INFO L225 Difference]: With dead ends: 429 [2021-06-05 04:56:30,211 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 04:56:30,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 04:56:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 218. [2021-06-05 04:56:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0230414746543777) internal successors, (656), 217 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 656 transitions. [2021-06-05 04:56:30,214 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 656 transitions. Word has length 19 [2021-06-05 04:56:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:30,214 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 656 transitions. [2021-06-05 04:56:30,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 656 transitions. [2021-06-05 04:56:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:30,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:30,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:30,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 04:56:30,415 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:30,415 INFO L82 PathProgramCache]: Analyzing trace with hash -810528698, now seen corresponding path program 66 times [2021-06-05 04:56:30,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:30,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935344282] [2021-06-05 04:56:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:30,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:30,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935344282] [2021-06-05 04:56:30,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935344282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:30,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139320602] [2021-06-05 04:56:30,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:30,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:30,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:30,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:30,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139320602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:30,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:30,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:30,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383766324] [2021-06-05 04:56:30,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:30,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:30,508 INFO L87 Difference]: Start difference. First operand 218 states and 656 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:30,577 INFO L93 Difference]: Finished difference Result 378 states and 1095 transitions. [2021-06-05 04:56:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:30,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:30,578 INFO L225 Difference]: With dead ends: 378 [2021-06-05 04:56:30,578 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:56:30,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:56:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 215. [2021-06-05 04:56:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0093457943925235) internal successors, (644), 214 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-06-05 04:56:30,581 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-06-05 04:56:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:30,581 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-06-05 04:56:30,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-06-05 04:56:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:30,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:30,581 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:30,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 04:56:30,782 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:30,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1177425635, now seen corresponding path program 67 times [2021-06-05 04:56:30,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:30,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753103141] [2021-06-05 04:56:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:30,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:30,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753103141] [2021-06-05 04:56:30,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753103141] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:30,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:30,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:30,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347295057] [2021-06-05 04:56:30,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:30,806 INFO L87 Difference]: Start difference. First operand 215 states and 644 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:30,875 INFO L93 Difference]: Finished difference Result 416 states and 1156 transitions. [2021-06-05 04:56:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:30,876 INFO L225 Difference]: With dead ends: 416 [2021-06-05 04:56:30,876 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 04:56:30,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 04:56:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 219. [2021-06-05 04:56:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9908256880733943) internal successors, (652), 218 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 652 transitions. [2021-06-05 04:56:30,879 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 652 transitions. Word has length 19 [2021-06-05 04:56:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:30,879 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 652 transitions. [2021-06-05 04:56:30,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 652 transitions. [2021-06-05 04:56:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:30,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:30,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:30,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690 [2021-06-05 04:56:30,879 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1713245131, now seen corresponding path program 68 times [2021-06-05 04:56:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:30,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521835219] [2021-06-05 04:56:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:30,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:30,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521835219] [2021-06-05 04:56:30,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521835219] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:30,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:30,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:30,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113575605] [2021-06-05 04:56:30,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:30,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:30,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:30,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:30,905 INFO L87 Difference]: Start difference. First operand 219 states and 652 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:30,979 INFO L93 Difference]: Finished difference Result 445 states and 1210 transitions. [2021-06-05 04:56:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:30,980 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:56:30,980 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 04:56:30,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 04:56:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 235. [2021-06-05 04:56:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.9743589743589745) internal successors, (696), 234 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 696 transitions. [2021-06-05 04:56:30,983 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 696 transitions. Word has length 19 [2021-06-05 04:56:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:30,983 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 696 transitions. [2021-06-05 04:56:30,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 696 transitions. [2021-06-05 04:56:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:30,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:30,983 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:30,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691 [2021-06-05 04:56:30,983 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1332507491, now seen corresponding path program 69 times [2021-06-05 04:56:30,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:30,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196811617] [2021-06-05 04:56:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:31,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196811617] [2021-06-05 04:56:31,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196811617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:31,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:31,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:31,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515140546] [2021-06-05 04:56:31,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:31,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:31,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:31,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:31,011 INFO L87 Difference]: Start difference. First operand 235 states and 696 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:31,077 INFO L93 Difference]: Finished difference Result 408 states and 1124 transitions. [2021-06-05 04:56:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:31,078 INFO L225 Difference]: With dead ends: 408 [2021-06-05 04:56:31,078 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 04:56:31,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 04:56:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 225. [2021-06-05 04:56:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.982142857142857) internal successors, (668), 224 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-06-05 04:56:31,081 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-06-05 04:56:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:31,081 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-06-05 04:56:31,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-06-05 04:56:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:31,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:31,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:31,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692 [2021-06-05 04:56:31,081 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1162202982, now seen corresponding path program 67 times [2021-06-05 04:56:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515856724] [2021-06-05 04:56:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:31,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515856724] [2021-06-05 04:56:31,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515856724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:31,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245625456] [2021-06-05 04:56:31,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:31,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245625456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:31,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:31,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:31,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922246227] [2021-06-05 04:56:31,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:31,168 INFO L87 Difference]: Start difference. First operand 225 states and 668 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:31,252 INFO L93 Difference]: Finished difference Result 510 states and 1495 transitions. [2021-06-05 04:56:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:31,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:31,253 INFO L225 Difference]: With dead ends: 510 [2021-06-05 04:56:31,253 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 04:56:31,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 04:56:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 225. [2021-06-05 04:56:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.982142857142857) internal successors, (668), 224 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-06-05 04:56:31,256 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-06-05 04:56:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:31,256 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-06-05 04:56:31,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-06-05 04:56:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:31,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:31,257 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:31,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:31,457 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1006371150, now seen corresponding path program 68 times [2021-06-05 04:56:31,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:31,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470457956] [2021-06-05 04:56:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:31,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470457956] [2021-06-05 04:56:31,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470457956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:31,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662082989] [2021-06-05 04:56:31,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:31,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:31,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662082989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:31,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:31,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:31,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302780243] [2021-06-05 04:56:31,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:31,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:31,561 INFO L87 Difference]: Start difference. First operand 225 states and 668 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:31,647 INFO L93 Difference]: Finished difference Result 528 states and 1528 transitions. [2021-06-05 04:56:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:31,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:31,648 INFO L225 Difference]: With dead ends: 528 [2021-06-05 04:56:31,648 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 04:56:31,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 04:56:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 231. [2021-06-05 04:56:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.0217391304347827) internal successors, (695), 230 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 695 transitions. [2021-06-05 04:56:31,651 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 695 transitions. Word has length 19 [2021-06-05 04:56:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:31,651 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 695 transitions. [2021-06-05 04:56:31,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 695 transitions. [2021-06-05 04:56:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:31,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:31,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:31,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable694,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:31,865 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:31,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1936532326, now seen corresponding path program 69 times [2021-06-05 04:56:31,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:31,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161340513] [2021-06-05 04:56:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:31,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161340513] [2021-06-05 04:56:31,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161340513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:31,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876923445] [2021-06-05 04:56:31,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:31,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:31,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:31,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:31,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:31,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876923445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:31,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:31,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:31,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995386515] [2021-06-05 04:56:31,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:31,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:31,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:31,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:31,964 INFO L87 Difference]: Start difference. First operand 231 states and 695 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:32,038 INFO L93 Difference]: Finished difference Result 474 states and 1375 transitions. [2021-06-05 04:56:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:32,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:32,039 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:56:32,039 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 04:56:32,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 04:56:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 227. [2021-06-05 04:56:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 3.0132743362831858) internal successors, (681), 226 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 681 transitions. [2021-06-05 04:56:32,042 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 681 transitions. Word has length 19 [2021-06-05 04:56:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:32,042 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 681 transitions. [2021-06-05 04:56:32,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 681 transitions. [2021-06-05 04:56:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:32,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:32,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:32,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 04:56:32,243 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1084350617, now seen corresponding path program 70 times [2021-06-05 04:56:32,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:32,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698488662] [2021-06-05 04:56:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:32,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:32,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698488662] [2021-06-05 04:56:32,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698488662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:32,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462421616] [2021-06-05 04:56:32,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:32,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:32,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:32,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:32,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462421616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:32,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:32,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:32,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949969238] [2021-06-05 04:56:32,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:32,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:32,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:32,337 INFO L87 Difference]: Start difference. First operand 227 states and 681 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:32,401 INFO L93 Difference]: Finished difference Result 367 states and 1041 transitions. [2021-06-05 04:56:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:32,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:32,402 INFO L225 Difference]: With dead ends: 367 [2021-06-05 04:56:32,402 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 04:56:32,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 04:56:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 221. [2021-06-05 04:56:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.0) internal successors, (660), 220 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 660 transitions. [2021-06-05 04:56:32,404 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 660 transitions. Word has length 19 [2021-06-05 04:56:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:32,405 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 660 transitions. [2021-06-05 04:56:32,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 660 transitions. [2021-06-05 04:56:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:32,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:32,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:32,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable698,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:32,605 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:32,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1215342274, now seen corresponding path program 70 times [2021-06-05 04:56:32,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:32,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821040163] [2021-06-05 04:56:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:32,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821040163] [2021-06-05 04:56:32,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821040163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325229481] [2021-06-05 04:56:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:32,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:32,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:32,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:32,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325229481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:32,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:32,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:56:32,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739916017] [2021-06-05 04:56:32,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:56:32,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:56:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:56:32,696 INFO L87 Difference]: Start difference. First operand 221 states and 660 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:32,770 INFO L93 Difference]: Finished difference Result 404 states and 1187 transitions. [2021-06-05 04:56:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:32,771 INFO L225 Difference]: With dead ends: 404 [2021-06-05 04:56:32,771 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 04:56:32,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 04:56:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 200. [2021-06-05 04:56:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9849246231155777) internal successors, (594), 199 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 594 transitions. [2021-06-05 04:56:32,774 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 594 transitions. Word has length 19 [2021-06-05 04:56:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:32,774 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 594 transitions. [2021-06-05 04:56:32,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 594 transitions. [2021-06-05 04:56:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:32,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:32,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:32,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 04:56:32,975 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:32,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1597715687, now seen corresponding path program 71 times [2021-06-05 04:56:32,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:32,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629635878] [2021-06-05 04:56:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:33,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:33,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629635878] [2021-06-05 04:56:33,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629635878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:33,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516987052] [2021-06-05 04:56:33,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:33,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:33,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516987052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:33,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:33,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:33,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056354003] [2021-06-05 04:56:33,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:33,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:33,084 INFO L87 Difference]: Start difference. First operand 200 states and 594 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:33,174 INFO L93 Difference]: Finished difference Result 356 states and 1020 transitions. [2021-06-05 04:56:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:33,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:33,175 INFO L225 Difference]: With dead ends: 356 [2021-06-05 04:56:33,175 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 04:56:33,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:33,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 04:56:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 216. [2021-06-05 04:56:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0232558139534884) internal successors, (650), 215 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-06-05 04:56:33,178 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-06-05 04:56:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:33,178 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-06-05 04:56:33,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-06-05 04:56:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:33,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:33,178 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:33,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:33,391 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1565768734, now seen corresponding path program 71 times [2021-06-05 04:56:33,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:33,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930007315] [2021-06-05 04:56:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:33,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:33,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930007315] [2021-06-05 04:56:33,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930007315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:33,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318287104] [2021-06-05 04:56:33,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:33,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:33,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318287104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:33,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:33,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:33,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787495595] [2021-06-05 04:56:33,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:33,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:33,497 INFO L87 Difference]: Start difference. First operand 216 states and 650 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:33,584 INFO L93 Difference]: Finished difference Result 393 states and 1145 transitions. [2021-06-05 04:56:33,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:33,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:33,584 INFO L225 Difference]: With dead ends: 393 [2021-06-05 04:56:33,584 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 04:56:33,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 04:56:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-06-05 04:56:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0232558139534884) internal successors, (650), 215 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-06-05 04:56:33,587 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-06-05 04:56:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:33,587 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-06-05 04:56:33,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-06-05 04:56:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:33,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:33,588 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:33,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-05 04:56:33,788 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:33,788 INFO L82 PathProgramCache]: Analyzing trace with hash 857230482, now seen corresponding path program 72 times [2021-06-05 04:56:33,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:33,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071330710] [2021-06-05 04:56:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:33,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:33,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071330710] [2021-06-05 04:56:33,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071330710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:33,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414913537] [2021-06-05 04:56:33,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:33,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:33,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:33,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:33,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:33,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414913537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:33,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:33,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:56:33,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947787691] [2021-06-05 04:56:33,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:56:33,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:56:33,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:56:33,881 INFO L87 Difference]: Start difference. First operand 216 states and 650 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:33,951 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-06-05 04:56:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:33,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:33,952 INFO L225 Difference]: With dead ends: 339 [2021-06-05 04:56:33,952 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 04:56:33,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 04:56:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 216. [2021-06-05 04:56:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0046511627906978) internal successors, (646), 215 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 646 transitions. [2021-06-05 04:56:33,954 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 646 transitions. Word has length 19 [2021-06-05 04:56:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:33,954 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 646 transitions. [2021-06-05 04:56:33,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 646 transitions. [2021-06-05 04:56:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:33,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:33,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:34,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:34,155 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1118431011, now seen corresponding path program 72 times [2021-06-05 04:56:34,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:34,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150720707] [2021-06-05 04:56:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:34,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:34,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150720707] [2021-06-05 04:56:34,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150720707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:34,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47050452] [2021-06-05 04:56:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:34,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:34,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:34,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:34,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47050452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:34,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:34,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:34,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718209225] [2021-06-05 04:56:34,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:34,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:34,268 INFO L87 Difference]: Start difference. First operand 216 states and 646 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:34,367 INFO L93 Difference]: Finished difference Result 310 states and 907 transitions. [2021-06-05 04:56:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:34,367 INFO L225 Difference]: With dead ends: 310 [2021-06-05 04:56:34,368 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 04:56:34,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 04:56:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 196. [2021-06-05 04:56:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.9846153846153847) internal successors, (582), 195 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 582 transitions. [2021-06-05 04:56:34,370 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 582 transitions. Word has length 19 [2021-06-05 04:56:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:34,370 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 582 transitions. [2021-06-05 04:56:34,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 582 transitions. [2021-06-05 04:56:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:34,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:34,370 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:34,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:34,571 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -720751567, now seen corresponding path program 73 times [2021-06-05 04:56:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:34,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933683672] [2021-06-05 04:56:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:34,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:34,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933683672] [2021-06-05 04:56:34,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933683672] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:34,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:34,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:34,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950958534] [2021-06-05 04:56:34,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:34,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:34,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:34,599 INFO L87 Difference]: Start difference. First operand 196 states and 582 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:34,677 INFO L93 Difference]: Finished difference Result 415 states and 1176 transitions. [2021-06-05 04:56:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:34,678 INFO L225 Difference]: With dead ends: 415 [2021-06-05 04:56:34,678 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:56:34,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:56:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 216. [2021-06-05 04:56:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.013953488372093) internal successors, (648), 215 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-06-05 04:56:34,681 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-06-05 04:56:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:34,681 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-06-05 04:56:34,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-06-05 04:56:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:34,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:34,682 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:34,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710 [2021-06-05 04:56:34,682 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:34,682 INFO L82 PathProgramCache]: Analyzing trace with hash -340013927, now seen corresponding path program 74 times [2021-06-05 04:56:34,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:34,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407036265] [2021-06-05 04:56:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:34,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407036265] [2021-06-05 04:56:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407036265] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:34,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:34,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:34,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236983914] [2021-06-05 04:56:34,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:34,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:34,709 INFO L87 Difference]: Start difference. First operand 216 states and 648 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:34,783 INFO L93 Difference]: Finished difference Result 421 states and 1191 transitions. [2021-06-05 04:56:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:34,784 INFO L225 Difference]: With dead ends: 421 [2021-06-05 04:56:34,784 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 04:56:34,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 04:56:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 220. [2021-06-05 04:56:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.0) internal successors, (657), 219 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 657 transitions. [2021-06-05 04:56:34,787 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 657 transitions. Word has length 19 [2021-06-05 04:56:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:34,787 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 657 transitions. [2021-06-05 04:56:34,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 657 transitions. [2021-06-05 04:56:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:34,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:34,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:34,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711 [2021-06-05 04:56:34,787 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1211611362, now seen corresponding path program 73 times [2021-06-05 04:56:34,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:34,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978690578] [2021-06-05 04:56:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:34,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:34,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978690578] [2021-06-05 04:56:34,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978690578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:34,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359692136] [2021-06-05 04:56:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:34,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:34,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359692136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:34,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:34,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:34,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873610172] [2021-06-05 04:56:34,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:34,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:34,892 INFO L87 Difference]: Start difference. First operand 220 states and 657 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:34,988 INFO L93 Difference]: Finished difference Result 479 states and 1393 transitions. [2021-06-05 04:56:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:34,989 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:56:34,989 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 04:56:34,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 04:56:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 226. [2021-06-05 04:56:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.04) internal successors, (684), 225 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 684 transitions. [2021-06-05 04:56:34,992 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 684 transitions. Word has length 19 [2021-06-05 04:56:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:34,992 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 684 transitions. [2021-06-05 04:56:34,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 684 transitions. [2021-06-05 04:56:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:34,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:34,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:35,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 04:56:35,193 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:35,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2141772538, now seen corresponding path program 74 times [2021-06-05 04:56:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:35,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934386867] [2021-06-05 04:56:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:35,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:35,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934386867] [2021-06-05 04:56:35,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934386867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:35,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042760165] [2021-06-05 04:56:35,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:35,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:35,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:35,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042760165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:35,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:35,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596527921] [2021-06-05 04:56:35,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:35,292 INFO L87 Difference]: Start difference. First operand 226 states and 684 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:35,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:35,369 INFO L93 Difference]: Finished difference Result 461 states and 1324 transitions. [2021-06-05 04:56:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:35,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:35,370 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:56:35,370 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 04:56:35,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 04:56:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 225. [2021-06-05 04:56:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.03125) internal successors, (679), 224 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 679 transitions. [2021-06-05 04:56:35,373 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 679 transitions. Word has length 19 [2021-06-05 04:56:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:35,374 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 679 transitions. [2021-06-05 04:56:35,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 679 transitions. [2021-06-05 04:56:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:35,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:35,374 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:35,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:35,574 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash -924885707, now seen corresponding path program 75 times [2021-06-05 04:56:35,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:35,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503140029] [2021-06-05 04:56:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:35,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503140029] [2021-06-05 04:56:35,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503140029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153369411] [2021-06-05 04:56:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:35,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:35,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:35,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153369411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:35,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:35,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687239024] [2021-06-05 04:56:35,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:35,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:35,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:35,689 INFO L87 Difference]: Start difference. First operand 225 states and 679 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:35,769 INFO L93 Difference]: Finished difference Result 439 states and 1238 transitions. [2021-06-05 04:56:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:35,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:35,770 INFO L225 Difference]: With dead ends: 439 [2021-06-05 04:56:35,770 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 04:56:35,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 04:56:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 225. [2021-06-05 04:56:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.044642857142857) internal successors, (682), 224 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 682 transitions. [2021-06-05 04:56:35,775 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 682 transitions. Word has length 19 [2021-06-05 04:56:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:35,775 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 682 transitions. [2021-06-05 04:56:35,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 682 transitions. [2021-06-05 04:56:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:35,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:35,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:35,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-05 04:56:35,985 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1412011018, now seen corresponding path program 75 times [2021-06-05 04:56:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:35,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022564369] [2021-06-05 04:56:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:36,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022564369] [2021-06-05 04:56:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022564369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247896537] [2021-06-05 04:56:36,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:36,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:56:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:36,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247896537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:36,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:36,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292972827] [2021-06-05 04:56:36,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:36,090 INFO L87 Difference]: Start difference. First operand 225 states and 682 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:36,173 INFO L93 Difference]: Finished difference Result 458 states and 1317 transitions. [2021-06-05 04:56:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:36,174 INFO L225 Difference]: With dead ends: 458 [2021-06-05 04:56:36,174 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 04:56:36,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 04:56:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 216. [2021-06-05 04:56:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0325581395348835) internal successors, (652), 215 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 652 transitions. [2021-06-05 04:56:36,176 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 652 transitions. Word has length 19 [2021-06-05 04:56:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:36,177 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 652 transitions. [2021-06-05 04:56:36,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 652 transitions. [2021-06-05 04:56:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:36,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:36,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:36,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:36,377 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1330770346, now seen corresponding path program 76 times [2021-06-05 04:56:36,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:36,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351908532] [2021-06-05 04:56:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:36,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:36,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351908532] [2021-06-05 04:56:36,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351908532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:36,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183972003] [2021-06-05 04:56:36,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:36,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:36,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:36,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183972003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:36,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:36,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:36,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836006944] [2021-06-05 04:56:36,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:36,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:36,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:36,483 INFO L87 Difference]: Start difference. First operand 216 states and 652 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:36,576 INFO L93 Difference]: Finished difference Result 413 states and 1189 transitions. [2021-06-05 04:56:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:36,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:36,577 INFO L225 Difference]: With dead ends: 413 [2021-06-05 04:56:36,577 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 04:56:36,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:56:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 04:56:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 216. [2021-06-05 04:56:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.013953488372093) internal successors, (648), 215 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-06-05 04:56:36,579 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-06-05 04:56:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:36,579 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-06-05 04:56:36,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-06-05 04:56:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:36,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:36,580 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:36,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:36,780 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash -644891147, now seen corresponding path program 76 times [2021-06-05 04:56:36,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:36,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257127877] [2021-06-05 04:56:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:36,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:36,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257127877] [2021-06-05 04:56:36,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257127877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:36,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094013183] [2021-06-05 04:56:36,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:36,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:36,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:36,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:36,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094013183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:36,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:36,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:36,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765208877] [2021-06-05 04:56:36,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:36,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:36,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:36,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:36,915 INFO L87 Difference]: Start difference. First operand 216 states and 648 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,023 INFO L93 Difference]: Finished difference Result 411 states and 1188 transitions. [2021-06-05 04:56:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,023 INFO L225 Difference]: With dead ends: 411 [2021-06-05 04:56:37,024 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 04:56:37,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 04:56:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 212. [2021-06-05 04:56:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.014218009478673) internal successors, (636), 211 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 636 transitions. [2021-06-05 04:56:37,026 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 636 transitions. Word has length 19 [2021-06-05 04:56:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,026 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 636 transitions. [2021-06-05 04:56:37,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 636 transitions. [2021-06-05 04:56:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 04:56:37,227 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1954614186, now seen corresponding path program 77 times [2021-06-05 04:56:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849023478] [2021-06-05 04:56:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849023478] [2021-06-05 04:56:37,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849023478] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:37,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:37,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:37,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113016423] [2021-06-05 04:56:37,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:37,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:37,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:37,253 INFO L87 Difference]: Start difference. First operand 212 states and 636 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,336 INFO L93 Difference]: Finished difference Result 384 states and 1100 transitions. [2021-06-05 04:56:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,337 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:56:37,337 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:56:37,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:56:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 222. [2021-06-05 04:56:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.990950226244344) internal successors, (661), 221 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 661 transitions. [2021-06-05 04:56:37,339 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 661 transitions. Word has length 19 [2021-06-05 04:56:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,339 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 661 transitions. [2021-06-05 04:56:37,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 661 transitions. [2021-06-05 04:56:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724 [2021-06-05 04:56:37,340 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash 852700034, now seen corresponding path program 78 times [2021-06-05 04:56:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256762399] [2021-06-05 04:56:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256762399] [2021-06-05 04:56:37,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256762399] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:37,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:37,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:37,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901179677] [2021-06-05 04:56:37,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:37,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:37,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:37,365 INFO L87 Difference]: Start difference. First operand 222 states and 661 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,431 INFO L93 Difference]: Finished difference Result 348 states and 1017 transitions. [2021-06-05 04:56:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,432 INFO L225 Difference]: With dead ends: 348 [2021-06-05 04:56:37,432 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 04:56:37,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 04:56:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 212. [2021-06-05 04:56:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.009478672985782) internal successors, (635), 211 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 635 transitions. [2021-06-05 04:56:37,435 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 635 transitions. Word has length 19 [2021-06-05 04:56:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,435 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 635 transitions. [2021-06-05 04:56:37,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 635 transitions. [2021-06-05 04:56:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725 [2021-06-05 04:56:37,435 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1616340899, now seen corresponding path program 77 times [2021-06-05 04:56:37,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877000706] [2021-06-05 04:56:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877000706] [2021-06-05 04:56:37,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877000706] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:37,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:37,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:37,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273850429] [2021-06-05 04:56:37,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:37,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:37,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:37,465 INFO L87 Difference]: Start difference. First operand 212 states and 635 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,541 INFO L93 Difference]: Finished difference Result 362 states and 1032 transitions. [2021-06-05 04:56:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,541 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:56:37,542 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 04:56:37,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 04:56:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 218. [2021-06-05 04:56:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9907834101382487) internal successors, (649), 217 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 649 transitions. [2021-06-05 04:56:37,544 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 649 transitions. Word has length 19 [2021-06-05 04:56:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,544 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 649 transitions. [2021-06-05 04:56:37,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 649 transitions. [2021-06-05 04:56:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,545 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726 [2021-06-05 04:56:37,545 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1345831207, now seen corresponding path program 78 times [2021-06-05 04:56:37,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559841653] [2021-06-05 04:56:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559841653] [2021-06-05 04:56:37,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559841653] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:37,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:37,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:37,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160673894] [2021-06-05 04:56:37,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:37,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:37,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:37,577 INFO L87 Difference]: Start difference. First operand 218 states and 649 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,660 INFO L93 Difference]: Finished difference Result 340 states and 995 transitions. [2021-06-05 04:56:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,661 INFO L225 Difference]: With dead ends: 340 [2021-06-05 04:56:37,661 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 04:56:37,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 04:56:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 195. [2021-06-05 04:56:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.984536082474227) internal successors, (579), 194 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 579 transitions. [2021-06-05 04:56:37,664 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 579 transitions. Word has length 19 [2021-06-05 04:56:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,664 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 579 transitions. [2021-06-05 04:56:37,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 579 transitions. [2021-06-05 04:56:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727 [2021-06-05 04:56:37,664 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash -494336067, now seen corresponding path program 79 times [2021-06-05 04:56:37,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270194965] [2021-06-05 04:56:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270194965] [2021-06-05 04:56:37,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270194965] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:37,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:37,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:37,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068659993] [2021-06-05 04:56:37,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:37,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:37,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:37,692 INFO L87 Difference]: Start difference. First operand 195 states and 579 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,757 INFO L93 Difference]: Finished difference Result 335 states and 937 transitions. [2021-06-05 04:56:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,758 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:56:37,758 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:56:37,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:56:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 212. [2021-06-05 04:56:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.9668246445497632) internal successors, (626), 211 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 626 transitions. [2021-06-05 04:56:37,761 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 626 transitions. Word has length 19 [2021-06-05 04:56:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 626 transitions. [2021-06-05 04:56:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 626 transitions. [2021-06-05 04:56:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,761 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728 [2021-06-05 04:56:37,761 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash -113598427, now seen corresponding path program 80 times [2021-06-05 04:56:37,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510084631] [2021-06-05 04:56:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510084631] [2021-06-05 04:56:37,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510084631] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:37,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:37,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:37,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281852847] [2021-06-05 04:56:37,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:37,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:37,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:37,788 INFO L87 Difference]: Start difference. First operand 212 states and 626 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,860 INFO L93 Difference]: Finished difference Result 333 states and 932 transitions. [2021-06-05 04:56:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,860 INFO L225 Difference]: With dead ends: 333 [2021-06-05 04:56:37,860 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 04:56:37,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 04:56:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 210. [2021-06-05 04:56:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.9617224880382773) internal successors, (619), 209 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 619 transitions. [2021-06-05 04:56:37,865 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 619 transitions. Word has length 19 [2021-06-05 04:56:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,865 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 619 transitions. [2021-06-05 04:56:37,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 619 transitions. [2021-06-05 04:56:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729 [2021-06-05 04:56:37,866 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,866 INFO L82 PathProgramCache]: Analyzing trace with hash 483738231, now seen corresponding path program 81 times [2021-06-05 04:56:37,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507613617] [2021-06-05 04:56:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507613617] [2021-06-05 04:56:37,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507613617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:37,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:37,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:37,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837103621] [2021-06-05 04:56:37,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:37,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:37,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:37,891 INFO L87 Difference]: Start difference. First operand 210 states and 619 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:37,952 INFO L93 Difference]: Finished difference Result 347 states and 973 transitions. [2021-06-05 04:56:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:37,953 INFO L225 Difference]: With dead ends: 347 [2021-06-05 04:56:37,953 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 04:56:37,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 04:56:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 208. [2021-06-05 04:56:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-06-05 04:56:37,956 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-06-05 04:56:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:37,956 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-06-05 04:56:37,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-06-05 04:56:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:37,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:37,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:37,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable730 [2021-06-05 04:56:37,956 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1339481934, now seen corresponding path program 79 times [2021-06-05 04:56:37,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:37,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046869591] [2021-06-05 04:56:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:37,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:37,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046869591] [2021-06-05 04:56:37,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046869591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:37,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632560753] [2021-06-05 04:56:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:38,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632560753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:38,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:38,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:38,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995767153] [2021-06-05 04:56:38,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:38,075 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:38,174 INFO L93 Difference]: Finished difference Result 388 states and 1116 transitions. [2021-06-05 04:56:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:38,175 INFO L225 Difference]: With dead ends: 388 [2021-06-05 04:56:38,175 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 04:56:38,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 04:56:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 214. [2021-06-05 04:56:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9906103286384975) internal successors, (637), 213 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 637 transitions. [2021-06-05 04:56:38,177 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 637 transitions. Word has length 19 [2021-06-05 04:56:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:38,177 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 637 transitions. [2021-06-05 04:56:38,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 637 transitions. [2021-06-05 04:56:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:38,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:38,178 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:38,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable731,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:38,378 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2025324186, now seen corresponding path program 80 times [2021-06-05 04:56:38,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:38,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388007942] [2021-06-05 04:56:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:38,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:38,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388007942] [2021-06-05 04:56:38,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388007942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:38,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649000287] [2021-06-05 04:56:38,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:38,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:38,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:38,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:38,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649000287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:38,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:38,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:38,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305998218] [2021-06-05 04:56:38,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:38,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:38,495 INFO L87 Difference]: Start difference. First operand 214 states and 637 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:38,572 INFO L93 Difference]: Finished difference Result 382 states and 1089 transitions. [2021-06-05 04:56:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:38,573 INFO L225 Difference]: With dead ends: 382 [2021-06-05 04:56:38,573 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:56:38,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:56:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:56:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 211. [2021-06-05 04:56:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9761904761904763) internal successors, (625), 210 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 625 transitions. [2021-06-05 04:56:38,575 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 625 transitions. Word has length 19 [2021-06-05 04:56:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:38,576 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 625 transitions. [2021-06-05 04:56:38,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 625 transitions. [2021-06-05 04:56:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:38,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:38,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:38,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-06-05 04:56:38,776 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1256950578, now seen corresponding path program 81 times [2021-06-05 04:56:38,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:38,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538648954] [2021-06-05 04:56:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:38,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538648954] [2021-06-05 04:56:38,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538648954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545202674] [2021-06-05 04:56:38,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:38,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:38,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:38,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:38,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:38,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545202674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:38,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:38,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:56:38,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524151997] [2021-06-05 04:56:38,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:56:38,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:38,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:56:38,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:38,873 INFO L87 Difference]: Start difference. First operand 211 states and 625 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:38,946 INFO L93 Difference]: Finished difference Result 370 states and 1047 transitions. [2021-06-05 04:56:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:38,947 INFO L225 Difference]: With dead ends: 370 [2021-06-05 04:56:38,947 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 04:56:38,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 04:56:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 208. [2021-06-05 04:56:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-06-05 04:56:38,950 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-06-05 04:56:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:38,950 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-06-05 04:56:38,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-06-05 04:56:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:38,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:38,950 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:39,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:39,151 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:39,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1258244423, now seen corresponding path program 82 times [2021-06-05 04:56:39,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:39,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069476177] [2021-06-05 04:56:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:39,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:39,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069476177] [2021-06-05 04:56:39,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069476177] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:39,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:39,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:39,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861069278] [2021-06-05 04:56:39,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:39,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:39,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:39,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:39,180 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:39,253 INFO L93 Difference]: Finished difference Result 371 states and 1007 transitions. [2021-06-05 04:56:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:39,253 INFO L225 Difference]: With dead ends: 371 [2021-06-05 04:56:39,254 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 04:56:39,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 04:56:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 218. [2021-06-05 04:56:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.986175115207373) internal successors, (648), 217 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 648 transitions. [2021-06-05 04:56:39,256 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 648 transitions. Word has length 19 [2021-06-05 04:56:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:39,256 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 648 transitions. [2021-06-05 04:56:39,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 648 transitions. [2021-06-05 04:56:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:39,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:39,257 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:39,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738 [2021-06-05 04:56:39,257 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash -877506783, now seen corresponding path program 83 times [2021-06-05 04:56:39,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880146060] [2021-06-05 04:56:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:39,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:39,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880146060] [2021-06-05 04:56:39,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880146060] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:39,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:39,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:39,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352342462] [2021-06-05 04:56:39,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:39,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:39,293 INFO L87 Difference]: Start difference. First operand 218 states and 648 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:39,367 INFO L93 Difference]: Finished difference Result 377 states and 1022 transitions. [2021-06-05 04:56:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:39,368 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:56:39,368 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:56:39,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:56:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 220. [2021-06-05 04:56:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9771689497716896) internal successors, (652), 219 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 652 transitions. [2021-06-05 04:56:39,370 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 652 transitions. Word has length 19 [2021-06-05 04:56:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:39,370 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 652 transitions. [2021-06-05 04:56:39,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 652 transitions. [2021-06-05 04:56:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:39,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:39,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:39,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739 [2021-06-05 04:56:39,371 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash 674118506, now seen corresponding path program 82 times [2021-06-05 04:56:39,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:39,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263582042] [2021-06-05 04:56:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:39,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263582042] [2021-06-05 04:56:39,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263582042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:39,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802313556] [2021-06-05 04:56:39,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:39,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:56:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:39,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:39,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:39,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802313556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:39,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:39,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:39,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966995901] [2021-06-05 04:56:39,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:39,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:39,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:39,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:39,501 INFO L87 Difference]: Start difference. First operand 220 states and 652 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:39,603 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-06-05 04:56:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:39,604 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:56:39,604 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 04:56:39,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 04:56:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 226. [2021-06-05 04:56:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.017777777777778) internal successors, (679), 225 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 679 transitions. [2021-06-05 04:56:39,607 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 679 transitions. Word has length 19 [2021-06-05 04:56:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:39,607 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 679 transitions. [2021-06-05 04:56:39,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 679 transitions. [2021-06-05 04:56:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:39,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:39,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:39,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-05 04:56:39,808 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:39,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1604279682, now seen corresponding path program 83 times [2021-06-05 04:56:39,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:39,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913095383] [2021-06-05 04:56:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:39,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:39,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913095383] [2021-06-05 04:56:39,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913095383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:39,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585500787] [2021-06-05 04:56:39,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:39,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:39,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:39,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:39,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585500787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:39,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:39,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:39,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592609046] [2021-06-05 04:56:39,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:39,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:39,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:39,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:39,920 INFO L87 Difference]: Start difference. First operand 226 states and 679 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:39,997 INFO L93 Difference]: Finished difference Result 415 states and 1158 transitions. [2021-06-05 04:56:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:39,998 INFO L225 Difference]: With dead ends: 415 [2021-06-05 04:56:39,998 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 04:56:39,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 04:56:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 225. [2021-06-05 04:56:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.0089285714285716) internal successors, (674), 224 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 674 transitions. [2021-06-05 04:56:40,002 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 674 transitions. Word has length 19 [2021-06-05 04:56:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:40,002 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 674 transitions. [2021-06-05 04:56:40,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 674 transitions. [2021-06-05 04:56:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:40,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:40,002 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:40,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 04:56:40,209 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1462378563, now seen corresponding path program 84 times [2021-06-05 04:56:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:40,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623944763] [2021-06-05 04:56:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:40,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:40,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623944763] [2021-06-05 04:56:40,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623944763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:40,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997601183] [2021-06-05 04:56:40,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:40,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:56:40,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:40,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:40,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:40,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997601183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:40,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:40,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:40,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128758998] [2021-06-05 04:56:40,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:40,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:40,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:40,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:40,322 INFO L87 Difference]: Start difference. First operand 225 states and 674 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:40,402 INFO L93 Difference]: Finished difference Result 343 states and 948 transitions. [2021-06-05 04:56:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:40,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:40,403 INFO L225 Difference]: With dead ends: 343 [2021-06-05 04:56:40,403 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 04:56:40,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 04:56:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 222. [2021-06-05 04:56:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0) internal successors, (663), 221 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 663 transitions. [2021-06-05 04:56:40,405 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 663 transitions. Word has length 19 [2021-06-05 04:56:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:40,405 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 663 transitions. [2021-06-05 04:56:40,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 663 transitions. [2021-06-05 04:56:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:40,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:40,406 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:40,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:40,606 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 874518162, now seen corresponding path program 84 times [2021-06-05 04:56:40,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:40,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206123659] [2021-06-05 04:56:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:40,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:40,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206123659] [2021-06-05 04:56:40,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206123659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:40,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776634448] [2021-06-05 04:56:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:40,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:56:40,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:40,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:40,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776634448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:40,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:40,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068211206] [2021-06-05 04:56:40,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:40,732 INFO L87 Difference]: Start difference. First operand 222 states and 663 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:40,815 INFO L93 Difference]: Finished difference Result 360 states and 1019 transitions. [2021-06-05 04:56:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:40,816 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:56:40,816 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 04:56:40,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 04:56:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 213. [2021-06-05 04:56:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9858490566037736) internal successors, (633), 212 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 633 transitions. [2021-06-05 04:56:40,819 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 633 transitions. Word has length 19 [2021-06-05 04:56:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:40,819 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 633 transitions. [2021-06-05 04:56:40,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 633 transitions. [2021-06-05 04:56:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:40,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:40,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:41,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-06-05 04:56:41,020 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash 793277490, now seen corresponding path program 85 times [2021-06-05 04:56:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:41,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727185885] [2021-06-05 04:56:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:41,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727185885] [2021-06-05 04:56:41,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727185885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214079885] [2021-06-05 04:56:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:41,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214079885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:41,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:41,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:41,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386647256] [2021-06-05 04:56:41,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:41,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:41,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:41,136 INFO L87 Difference]: Start difference. First operand 213 states and 633 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:41,215 INFO L93 Difference]: Finished difference Result 315 states and 891 transitions. [2021-06-05 04:56:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:41,216 INFO L225 Difference]: With dead ends: 315 [2021-06-05 04:56:41,216 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 04:56:41,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 04:56:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 213. [2021-06-05 04:56:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9669811320754715) internal successors, (629), 212 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-06-05 04:56:41,218 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 19 [2021-06-05 04:56:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:41,219 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-06-05 04:56:41,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-06-05 04:56:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:41,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:41,219 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:41,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:41,419 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1182384003, now seen corresponding path program 85 times [2021-06-05 04:56:41,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:41,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089558630] [2021-06-05 04:56:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:41,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:41,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089558630] [2021-06-05 04:56:41,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089558630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:41,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863989229] [2021-06-05 04:56:41,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:56:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:41,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863989229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:41,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:41,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:56:41,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356839164] [2021-06-05 04:56:41,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:56:41,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:56:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:41,544 INFO L87 Difference]: Start difference. First operand 213 states and 629 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:41,625 INFO L93 Difference]: Finished difference Result 302 states and 860 transitions. [2021-06-05 04:56:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:41,626 INFO L225 Difference]: With dead ends: 302 [2021-06-05 04:56:41,626 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 04:56:41,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:56:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 04:56:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2021-06-05 04:56:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9663461538461537) internal successors, (617), 208 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 617 transitions. [2021-06-05 04:56:41,628 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 617 transitions. Word has length 19 [2021-06-05 04:56:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:41,628 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 617 transitions. [2021-06-05 04:56:41,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 617 transitions. [2021-06-05 04:56:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:41,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:41,629 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:41,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 04:56:41,829 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1417121330, now seen corresponding path program 86 times [2021-06-05 04:56:41,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:41,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177138518] [2021-06-05 04:56:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:41,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:41,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177138518] [2021-06-05 04:56:41,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177138518] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:41,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:41,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:41,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559449306] [2021-06-05 04:56:41,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:41,857 INFO L87 Difference]: Start difference. First operand 209 states and 617 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:41,963 INFO L93 Difference]: Finished difference Result 353 states and 973 transitions. [2021-06-05 04:56:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:41,964 INFO L225 Difference]: With dead ends: 353 [2021-06-05 04:56:41,964 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:56:41,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:56:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 219. [2021-06-05 04:56:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.944954128440367) internal successors, (642), 218 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 642 transitions. [2021-06-05 04:56:41,966 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 642 transitions. Word has length 19 [2021-06-05 04:56:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:41,967 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 642 transitions. [2021-06-05 04:56:41,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 642 transitions. [2021-06-05 04:56:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:41,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:41,967 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:41,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752 [2021-06-05 04:56:41,967 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:41,967 INFO L82 PathProgramCache]: Analyzing trace with hash 315207178, now seen corresponding path program 87 times [2021-06-05 04:56:41,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:41,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359921811] [2021-06-05 04:56:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:41,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:41,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359921811] [2021-06-05 04:56:41,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359921811] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:41,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:41,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:41,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872065200] [2021-06-05 04:56:41,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:41,997 INFO L87 Difference]: Start difference. First operand 219 states and 642 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,095 INFO L93 Difference]: Finished difference Result 317 states and 890 transitions. [2021-06-05 04:56:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,096 INFO L225 Difference]: With dead ends: 317 [2021-06-05 04:56:42,096 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 04:56:42,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 04:56:42,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 209. [2021-06-05 04:56:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9615384615384617) internal successors, (616), 208 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 616 transitions. [2021-06-05 04:56:42,098 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 616 transitions. Word has length 19 [2021-06-05 04:56:42,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,098 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 616 transitions. [2021-06-05 04:56:42,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,098 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 616 transitions. [2021-06-05 04:56:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753 [2021-06-05 04:56:42,099 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2141133541, now seen corresponding path program 86 times [2021-06-05 04:56:42,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148366149] [2021-06-05 04:56:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148366149] [2021-06-05 04:56:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148366149] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604628538] [2021-06-05 04:56:42,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,128 INFO L87 Difference]: Start difference. First operand 209 states and 616 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,205 INFO L93 Difference]: Finished difference Result 353 states and 981 transitions. [2021-06-05 04:56:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,205 INFO L225 Difference]: With dead ends: 353 [2021-06-05 04:56:42,206 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:56:42,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:56:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 221. [2021-06-05 04:56:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9681818181818183) internal successors, (653), 220 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 653 transitions. [2021-06-05 04:56:42,208 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 653 transitions. Word has length 19 [2021-06-05 04:56:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,208 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 653 transitions. [2021-06-05 04:56:42,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 653 transitions. [2021-06-05 04:56:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,209 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754 [2021-06-05 04:56:42,209 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1883324063, now seen corresponding path program 87 times [2021-06-05 04:56:42,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96418160] [2021-06-05 04:56:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96418160] [2021-06-05 04:56:42,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96418160] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996120926] [2021-06-05 04:56:42,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,248 INFO L87 Difference]: Start difference. First operand 221 states and 653 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,330 INFO L93 Difference]: Finished difference Result 331 states and 944 transitions. [2021-06-05 04:56:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,330 INFO L225 Difference]: With dead ends: 331 [2021-06-05 04:56:42,330 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 04:56:42,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 04:56:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 208. [2021-06-05 04:56:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-06-05 04:56:42,333 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-06-05 04:56:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,333 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-06-05 04:56:42,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-06-05 04:56:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755 [2021-06-05 04:56:42,333 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,334 INFO L82 PathProgramCache]: Analyzing trace with hash -249991038, now seen corresponding path program 88 times [2021-06-05 04:56:42,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067249344] [2021-06-05 04:56:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067249344] [2021-06-05 04:56:42,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067249344] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910523008] [2021-06-05 04:56:42,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,357 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,446 INFO L93 Difference]: Finished difference Result 292 states and 822 transitions. [2021-06-05 04:56:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,447 INFO L225 Difference]: With dead ends: 292 [2021-06-05 04:56:42,447 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 04:56:42,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 04:56:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 210. [2021-06-05 04:56:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.9473684210526314) internal successors, (616), 209 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 616 transitions. [2021-06-05 04:56:42,449 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 616 transitions. Word has length 19 [2021-06-05 04:56:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,449 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 616 transitions. [2021-06-05 04:56:42,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 616 transitions. [2021-06-05 04:56:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable756 [2021-06-05 04:56:42,450 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash 144187622, now seen corresponding path program 89 times [2021-06-05 04:56:42,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562000312] [2021-06-05 04:56:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562000312] [2021-06-05 04:56:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562000312] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039008254] [2021-06-05 04:56:42,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,476 INFO L87 Difference]: Start difference. First operand 210 states and 616 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,577 INFO L93 Difference]: Finished difference Result 280 states and 784 transitions. [2021-06-05 04:56:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,578 INFO L225 Difference]: With dead ends: 280 [2021-06-05 04:56:42,578 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 04:56:42,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 04:56:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 220. [2021-06-05 04:56:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-06-05 04:56:42,580 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 19 [2021-06-05 04:56:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,580 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-06-05 04:56:42,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-06-05 04:56:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,581 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757 [2021-06-05 04:56:42,581 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,581 INFO L82 PathProgramCache]: Analyzing trace with hash -957726530, now seen corresponding path program 90 times [2021-06-05 04:56:42,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115185663] [2021-06-05 04:56:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115185663] [2021-06-05 04:56:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115185663] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387636739] [2021-06-05 04:56:42,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,608 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,690 INFO L93 Difference]: Finished difference Result 244 states and 701 transitions. [2021-06-05 04:56:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,691 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:56:42,691 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 04:56:42,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:56:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 04:56:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2021-06-05 04:56:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9565217391304346) internal successors, (612), 207 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 612 transitions. [2021-06-05 04:56:42,693 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 612 transitions. Word has length 19 [2021-06-05 04:56:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,693 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 612 transitions. [2021-06-05 04:56:42,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 612 transitions. [2021-06-05 04:56:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758 [2021-06-05 04:56:42,694 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,694 INFO L82 PathProgramCache]: Analyzing trace with hash -427692237, now seen corresponding path program 88 times [2021-06-05 04:56:42,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720585949] [2021-06-05 04:56:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720585949] [2021-06-05 04:56:42,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720585949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851432858] [2021-06-05 04:56:42,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,725 INFO L87 Difference]: Start difference. First operand 208 states and 612 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,786 INFO L93 Difference]: Finished difference Result 277 states and 780 transitions. [2021-06-05 04:56:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,787 INFO L225 Difference]: With dead ends: 277 [2021-06-05 04:56:42,787 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 04:56:42,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 04:56:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 208. [2021-06-05 04:56:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9516908212560384) internal successors, (611), 207 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 611 transitions. [2021-06-05 04:56:42,790 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 611 transitions. Word has length 19 [2021-06-05 04:56:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,790 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 611 transitions. [2021-06-05 04:56:42,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 611 transitions. [2021-06-05 04:56:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759 [2021-06-05 04:56:42,790 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,790 INFO L82 PathProgramCache]: Analyzing trace with hash 656044215, now seen corresponding path program 89 times [2021-06-05 04:56:42,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457495262] [2021-06-05 04:56:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457495262] [2021-06-05 04:56:42,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457495262] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110778219] [2021-06-05 04:56:42,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,818 INFO L87 Difference]: Start difference. First operand 208 states and 611 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,883 INFO L93 Difference]: Finished difference Result 281 states and 792 transitions. [2021-06-05 04:56:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,884 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:56:42,884 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 04:56:42,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 04:56:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 214. [2021-06-05 04:56:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9342723004694835) internal successors, (625), 213 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 625 transitions. [2021-06-05 04:56:42,887 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 625 transitions. Word has length 19 [2021-06-05 04:56:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,887 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 625 transitions. [2021-06-05 04:56:42,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 625 transitions. [2021-06-05 04:56:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:56:42,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760 [2021-06-05 04:56:42,887 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash 926553907, now seen corresponding path program 90 times [2021-06-05 04:56:42,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230535411] [2021-06-05 04:56:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:42,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:42,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230535411] [2021-06-05 04:56:42,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230535411] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:56:42,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:56:42,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 04:56:42,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094316590] [2021-06-05 04:56:42,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:56:42,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:56:42,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:56:42,918 INFO L87 Difference]: Start difference. First operand 214 states and 625 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:42,988 INFO L93 Difference]: Finished difference Result 246 states and 717 transitions. [2021-06-05 04:56:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:56:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:56:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:42,989 INFO L225 Difference]: With dead ends: 246 [2021-06-05 04:56:42,989 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 04:56:42,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:56:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 04:56:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 189. [2021-06-05 04:56:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 04:56:42,991 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-06-05 04:56:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:42,991 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 04:56:42,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 04:56:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:42,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:42,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable761 [2021-06-05 04:56:42,992 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash 92049292, now seen corresponding path program 1 times [2021-06-05 04:56:42,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:42,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200219926] [2021-06-05 04:56:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:43,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:43,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200219926] [2021-06-05 04:56:43,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200219926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:43,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771940582] [2021-06-05 04:56:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:56:43,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:43,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:43,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:43,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:43,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:43,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:43,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:43,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:56:43,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,167 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-06-05 04:56:44,168 INFO L628 ElimStorePlain]: treesize reduction 108, result has 72.6 percent of original size [2021-06-05 04:56:44,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:44,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:44,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:44,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:44,287 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:44,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:44,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:44,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:44,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:44,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:56:44,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:44,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:44,597 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:44,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:44,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:56:44,696 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-06-05 04:56:44,847 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 04:56:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771940582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:45,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:45,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:56:45,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653835185] [2021-06-05 04:56:45,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:45,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:45,451 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:45,691 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 04:56:45,897 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-06-05 04:56:46,294 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 130 [2021-06-05 04:56:46,803 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 135 [2021-06-05 04:56:47,260 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 115 [2021-06-05 04:56:47,783 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 142 [2021-06-05 04:56:48,111 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 115 [2021-06-05 04:56:48,729 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 160 [2021-06-05 04:56:49,045 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 112 [2021-06-05 04:56:49,716 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 167 [2021-06-05 04:56:50,471 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 161 [2021-06-05 04:56:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:50,537 INFO L93 Difference]: Finished difference Result 540 states and 1464 transitions. [2021-06-05 04:56:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:56:50,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:50,538 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:56:50,538 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 04:56:50,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 5667.7ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:56:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 04:56:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 249. [2021-06-05 04:56:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.8588709677419355) internal successors, (709), 248 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 709 transitions. [2021-06-05 04:56:50,541 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 709 transitions. Word has length 20 [2021-06-05 04:56:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:50,541 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 709 transitions. [2021-06-05 04:56:50,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 709 transitions. [2021-06-05 04:56:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:50,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:50,541 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:50,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 04:56:50,742 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash -304868362, now seen corresponding path program 2 times [2021-06-05 04:56:50,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:50,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356518426] [2021-06-05 04:56:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:51,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:51,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356518426] [2021-06-05 04:56:51,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356518426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:51,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162240498] [2021-06-05 04:56:51,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:51,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:56:51,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:51,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:56:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:51,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:51,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:51,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:51,773 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 04:56:51,774 INFO L628 ElimStorePlain]: treesize reduction 156, result has 66.2 percent of original size [2021-06-05 04:56:51,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:51,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:51,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:51,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:51,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:51,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:51,891 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 04:56:51,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:51,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:51,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:51,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:51,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:51,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:56:51,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:52,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:52,015 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:52,020 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:52,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:52,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:52,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:52,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:52,190 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:52,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:52,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:56:52,286 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-06-05 04:56:52,438 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 04:56:53,081 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 04:56:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:53,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162240498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:53,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:56:53,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:56:53,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310219194] [2021-06-05 04:56:53,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:56:53,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:56:53,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:56:53,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:56:53,259 INFO L87 Difference]: Start difference. First operand 249 states and 709 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:53,493 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 04:56:53,704 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 04:56:54,101 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 136 [2021-06-05 04:56:54,771 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 142 [2021-06-05 04:56:55,453 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 145 [2021-06-05 04:56:56,230 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 153 [2021-06-05 04:56:57,095 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 162 [2021-06-05 04:56:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:56:57,112 INFO L93 Difference]: Finished difference Result 438 states and 1180 transitions. [2021-06-05 04:56:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:56:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:56:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:56:57,113 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:56:57,113 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 04:56:57,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 4685.0ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:56:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 04:56:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 255. [2021-06-05 04:56:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.854330708661417) internal successors, (725), 254 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 725 transitions. [2021-06-05 04:56:57,116 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 725 transitions. Word has length 20 [2021-06-05 04:56:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:56:57,116 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 725 transitions. [2021-06-05 04:56:57,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:56:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 725 transitions. [2021-06-05 04:56:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:56:57,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:56:57,116 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:56:57,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:57,317 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:56:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:56:57,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2003588750, now seen corresponding path program 3 times [2021-06-05 04:56:57,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:56:57,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66670370] [2021-06-05 04:56:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:56:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:56:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:56:57,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:56:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66670370] [2021-06-05 04:56:57,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66670370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:56:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95731875] [2021-06-05 04:56:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:56:57,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:56:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:56:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:56:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:56:58,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:56:58,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:56:58,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:58,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:58,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:56:58,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:58,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:56:58,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,019 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 04:56:59,019 INFO L628 ElimStorePlain]: treesize reduction 540, result has 46.9 percent of original size [2021-06-05 04:56:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:59,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:59,047 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:56:59,054 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,367 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-06-05 04:56:59,368 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 04:56:59,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:56:59,374 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:56:59,380 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:59,386 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,535 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 04:56:59,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:56:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:56:59,542 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:56:59,551 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:56:59,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:56:59,557 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:56:59,829 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 04:56:59,829 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 04:56:59,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 04:56:59,839 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1129, output treesize:336 [2021-06-05 04:57:00,239 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 04:57:00,527 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_82, v_prenex_60, v_prenex_70, v_prenex_80, v_prenex_76, v_prenex_74, v_prenex_84, v_prenex_58, v_prenex_68, v_prenex_78, v_prenex_66, v_prenex_90], 1=[v_prenex_83, v_prenex_81, v_prenex_87, v_prenex_65, v_prenex_75, v_prenex_73, v_prenex_69, v_prenex_79, v_prenex_57, v_prenex_67, v_prenex_77, v_prenex_59]} [2021-06-05 04:57:00,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:00,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:00,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:00,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:00,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:00,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:01,038 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 107 [2021-06-05 04:57:01,039 INFO L628 ElimStorePlain]: treesize reduction 1017, result has 27.7 percent of original size [2021-06-05 04:57:01,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_60 vanished before elimination [2021-06-05 04:57:01,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_70 vanished before elimination [2021-06-05 04:57:01,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:01,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:01,190 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 04:57:01,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:01,190 INFO L518 ElimStorePlain]: Eliminatee v_prenex_76 vanished before elimination [2021-06-05 04:57:01,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:01,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:01,341 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 04:57:01,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:01,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:01,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:01,488 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 04:57:01,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:01,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:01,494 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:01,644 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 04:57:01,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:01,645 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-06-05 04:57:01,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:01,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:01,785 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 04:57:01,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:01,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-06-05 04:57:01,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:01,791 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:01,921 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 04:57:01,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:01,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_83 vanished before elimination [2021-06-05 04:57:01,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_81 vanished before elimination [2021-06-05 04:57:01,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_87 vanished before elimination [2021-06-05 04:57:01,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_65 vanished before elimination [2021-06-05 04:57:01,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-06-05 04:57:01,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_73 vanished before elimination [2021-06-05 04:57:01,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_69 vanished before elimination [2021-06-05 04:57:01,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_79 vanished before elimination [2021-06-05 04:57:01,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-06-05 04:57:01,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-06-05 04:57:01,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-06-05 04:57:01,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-06-05 04:57:01,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-05 04:57:01,930 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 36 variables, input treesize:1435, output treesize:283 [2021-06-05 04:57:02,070 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 04:57:02,288 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 04:57:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:02,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95731875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:02,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:02,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:57:02,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056601830] [2021-06-05 04:57:02,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:02,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:02,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:02,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:02,383 INFO L87 Difference]: Start difference. First operand 255 states and 725 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:02,760 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 04:57:03,238 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 164 [2021-06-05 04:57:03,814 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 168 [2021-06-05 04:57:04,746 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 191 [2021-06-05 04:57:05,597 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 190 [2021-06-05 04:57:06,564 WARN L205 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 197 [2021-06-05 04:57:07,792 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 242 DAG size of output: 206 [2021-06-05 04:57:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:07,828 INFO L93 Difference]: Finished difference Result 470 states and 1256 transitions. [2021-06-05 04:57:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:57:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:07,829 INFO L225 Difference]: With dead ends: 470 [2021-06-05 04:57:07,829 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:57:07,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 6298.1ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:57:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:57:07,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 266. [2021-06-05 04:57:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.8075471698113206) internal successors, (744), 265 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 744 transitions. [2021-06-05 04:57:07,832 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 744 transitions. Word has length 20 [2021-06-05 04:57:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:07,832 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 744 transitions. [2021-06-05 04:57:07,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 744 transitions. [2021-06-05 04:57:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:07,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:07,833 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable910,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:08,033 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2118130854, now seen corresponding path program 4 times [2021-06-05 04:57:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702396021] [2021-06-05 04:57:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702396021] [2021-06-05 04:57:08,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702396021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:08,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622758444] [2021-06-05 04:57:08,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:08,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:08,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:57:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:08,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:08,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:08,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,902 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 04:57:08,902 INFO L628 ElimStorePlain]: treesize reduction 156, result has 66.2 percent of original size [2021-06-05 04:57:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:08,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:08,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:08,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:08,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:08,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,021 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 04:57:09,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:09,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:09,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:09,127 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:09,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:09,304 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:09,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:09,308 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:09,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:09,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:57:09,388 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-06-05 04:57:09,543 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 04:57:09,886 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 04:57:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622758444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:10,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:10,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:57:10,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523753405] [2021-06-05 04:57:10,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:10,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:10,183 INFO L87 Difference]: Start difference. First operand 266 states and 744 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:10,406 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 04:57:10,619 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-05 04:57:11,001 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 129 [2021-06-05 04:57:11,447 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 133 [2021-06-05 04:57:11,964 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 140 [2021-06-05 04:57:12,415 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 145 [2021-06-05 04:57:12,923 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 154 [2021-06-05 04:57:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:12,938 INFO L93 Difference]: Finished difference Result 412 states and 1120 transitions. [2021-06-05 04:57:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:12,938 INFO L225 Difference]: With dead ends: 412 [2021-06-05 04:57:12,939 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 04:57:12,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 3371.6ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:57:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 04:57:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 244. [2021-06-05 04:57:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.8641975308641974) internal successors, (696), 243 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 696 transitions. [2021-06-05 04:57:12,941 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 696 transitions. Word has length 20 [2021-06-05 04:57:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:12,942 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 696 transitions. [2021-06-05 04:57:12,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 696 transitions. [2021-06-05 04:57:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:12,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:12,942 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:13,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-05 04:57:13,142 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash -225291252, now seen corresponding path program 5 times [2021-06-05 04:57:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:13,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053212946] [2021-06-05 04:57:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:13,528 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-05 04:57:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:13,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:13,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053212946] [2021-06-05 04:57:13,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053212946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:13,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839996632] [2021-06-05 04:57:13,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:13,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:13,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:57:13,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:13,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:13,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:13,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:13,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:13,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:13,864 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:13,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:13,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:13,887 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:57:13,891 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:57:13,895 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:13,900 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:13,904 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:13,908 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:57:13,913 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:13,917 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:57:13,921 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:57:13,925 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:13,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:13,929 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:14,050 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 04:57:14,050 INFO L628 ElimStorePlain]: treesize reduction 103, result has 63.5 percent of original size [2021-06-05 04:57:14,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 04:57:14,052 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-06-05 04:57:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839996632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:14,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:14,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:57:14,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937426952] [2021-06-05 04:57:14,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:14,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:14,415 INFO L87 Difference]: Start difference. First operand 244 states and 696 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:15,239 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2021-06-05 04:57:15,712 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 85 [2021-06-05 04:57:15,935 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 04:57:16,199 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2021-06-05 04:57:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:16,210 INFO L93 Difference]: Finished difference Result 377 states and 1054 transitions. [2021-06-05 04:57:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:16,210 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:57:16,210 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 04:57:16,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2396.5ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:57:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 04:57:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 250. [2021-06-05 04:57:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.859437751004016) internal successors, (712), 249 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 712 transitions. [2021-06-05 04:57:16,213 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 712 transitions. Word has length 20 [2021-06-05 04:57:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:16,213 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 712 transitions. [2021-06-05 04:57:16,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 712 transitions. [2021-06-05 04:57:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:16,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:16,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:16,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-06-05 04:57:16,414 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:16,414 INFO L82 PathProgramCache]: Analyzing trace with hash 253993424, now seen corresponding path program 6 times [2021-06-05 04:57:16,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:16,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109088454] [2021-06-05 04:57:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:16,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109088454] [2021-06-05 04:57:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109088454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168216544] [2021-06-05 04:57:16,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:16,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:16,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:57:16,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:17,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:57:17,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:17,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:17,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:17,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:17,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:17,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:17,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:17,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,302 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-06-05 04:57:18,302 INFO L628 ElimStorePlain]: treesize reduction 579, result has 46.4 percent of original size [2021-06-05 04:57:18,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:18,309 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:18,317 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:18,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,671 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 04:57:18,671 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 04:57:18,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:18,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:18,684 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:18,689 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,856 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 04:57:18,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:18,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:18,863 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:18,868 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:18,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:18,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:18,874 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,036 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 04:57:19,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:19,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 04:57:19,046 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1249, output treesize:397 [2021-06-05 04:57:19,263 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 04:57:19,627 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_141, v_prenex_143, v_prenex_135, v_prenex_137, v_prenex_139], 1=[v_prenex_140, v_prenex_142, v_prenex_144, get_0, v_prenex_136, v_prenex_138]} [2021-06-05 04:57:19,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:19,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:57:19,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:19,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:19,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:19,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:19,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:19,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,184 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 102 [2021-06-05 04:57:20,185 INFO L628 ElimStorePlain]: treesize reduction 1573, result has 19.5 percent of original size [2021-06-05 04:57:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:20,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,335 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 04:57:20,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:20,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:20,341 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,479 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 04:57:20,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:20,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:20,485 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,622 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 04:57:20,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:20,627 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,763 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 04:57:20,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:20,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:20,768 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:20,898 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 04:57:20,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:20,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_140 vanished before elimination [2021-06-05 04:57:20,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 04:57:20,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-06-05 04:57:20,899 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 04:57:20,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_136 vanished before elimination [2021-06-05 04:57:20,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-06-05 04:57:20,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-05 04:57:20,903 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:2135, output treesize:283 [2021-06-05 04:57:21,048 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 04:57:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:21,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168216544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:21,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:21,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:57:21,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078691359] [2021-06-05 04:57:21,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:21,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:21,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:21,256 INFO L87 Difference]: Start difference. First operand 250 states and 712 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:21,558 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-06-05 04:57:21,860 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2021-06-05 04:57:22,245 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2021-06-05 04:57:23,024 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 195 [2021-06-05 04:57:23,208 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 04:57:23,735 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 117 [2021-06-05 04:57:23,893 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 04:57:24,483 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 125 [2021-06-05 04:57:24,787 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 04:57:25,513 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 134 [2021-06-05 04:57:25,851 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 04:57:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:25,884 INFO L93 Difference]: Finished difference Result 498 states and 1324 transitions. [2021-06-05 04:57:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:57:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:25,885 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:57:25,885 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 04:57:25,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 5382.2ms TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:57:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 04:57:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-06-05 04:57:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.8796992481203008) internal successors, (766), 266 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 766 transitions. [2021-06-05 04:57:25,889 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 766 transitions. Word has length 20 [2021-06-05 04:57:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:25,889 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 766 transitions. [2021-06-05 04:57:25,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 766 transitions. [2021-06-05 04:57:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:25,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:25,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:26,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:26,090 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1444726964, now seen corresponding path program 7 times [2021-06-05 04:57:26,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:26,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144838450] [2021-06-05 04:57:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:26,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:26,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144838450] [2021-06-05 04:57:26,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144838450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:26,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026004125] [2021-06-05 04:57:26,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:26,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:57:26,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:27,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:27,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:27,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:57:27,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,307 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2021-06-05 04:57:27,307 INFO L628 ElimStorePlain]: treesize reduction 116, result has 74.7 percent of original size [2021-06-05 04:57:27,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:27,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:27,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,450 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 04:57:27,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:27,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:27,463 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,586 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 04:57:27,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:27,593 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,712 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 04:57:27,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:27,718 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,837 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 04:57:27,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:27,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:27,843 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:27,962 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 04:57:27,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:27,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:57:27,968 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:565, output treesize:268 [2021-06-05 04:57:28,177 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-06-05 04:57:28,897 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_161, v_prenex_163, get_6, v_prenex_165, v_prenex_167, v_prenex_169, v_prenex_159], 1=[v_prenex_170, v_prenex_160, v_prenex_162, v_prenex_164, v_prenex_166, v_prenex_168, get_0]} [2021-06-05 04:57:28,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:28,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:57:28,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 04:57:28,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:57:28,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:57:28,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:28,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 04:57:28,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:29,493 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 104 [2021-06-05 04:57:29,494 INFO L628 ElimStorePlain]: treesize reduction 1750, result has 17.2 percent of original size [2021-06-05 04:57:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:57:29,500 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:29,639 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 04:57:29,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:29,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:29,645 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:29,783 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 04:57:29,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:29,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:29,789 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:29,924 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 04:57:29,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:29,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:29,935 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,066 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 04:57:30,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:30,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:30,071 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,196 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 04:57:30,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:30,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:30,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:30,324 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 04:57:30,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:30,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_170 vanished before elimination [2021-06-05 04:57:30,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-05 04:57:30,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_162 vanished before elimination [2021-06-05 04:57:30,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_164 vanished before elimination [2021-06-05 04:57:30,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-05 04:57:30,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_168 vanished before elimination [2021-06-05 04:57:30,325 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 04:57:30,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 04:57:30,328 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2293, output treesize:253 [2021-06-05 04:57:30,736 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-06-05 04:57:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:30,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026004125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:30,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:30,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:57:30,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107712846] [2021-06-05 04:57:30,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:30,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:30,829 INFO L87 Difference]: Start difference. First operand 267 states and 766 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:31,506 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 04:57:32,006 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 137 [2021-06-05 04:57:32,171 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 04:57:32,628 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2021-06-05 04:57:33,340 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 103 [2021-06-05 04:57:33,519 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 04:57:34,187 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 110 [2021-06-05 04:57:34,398 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 04:57:34,969 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-06-05 04:57:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:34,970 INFO L93 Difference]: Finished difference Result 458 states and 1250 transitions. [2021-06-05 04:57:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:57:34,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:34,971 INFO L225 Difference]: With dead ends: 458 [2021-06-05 04:57:34,971 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:57:34,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4893.7ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:57:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:57:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 261. [2021-06-05 04:57:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.8846153846153846) internal successors, (750), 260 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 750 transitions. [2021-06-05 04:57:34,974 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 750 transitions. Word has length 20 [2021-06-05 04:57:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:34,974 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 750 transitions. [2021-06-05 04:57:34,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 750 transitions. [2021-06-05 04:57:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:34,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:34,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:35,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1425 [2021-06-05 04:57:35,189 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash 789223226, now seen corresponding path program 8 times [2021-06-05 04:57:35,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:35,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841883516] [2021-06-05 04:57:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:35,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:35,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841883516] [2021-06-05 04:57:35,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841883516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:35,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125656244] [2021-06-05 04:57:35,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:35,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:35,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:57:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:36,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:36,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:57:36,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:36,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,299 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2021-06-05 04:57:36,300 INFO L628 ElimStorePlain]: treesize reduction 110, result has 74.1 percent of original size [2021-06-05 04:57:36,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:36,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,428 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 04:57:36,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:36,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:36,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,567 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 04:57:36,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:36,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:36,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:36,580 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,687 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 04:57:36,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:36,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:36,701 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:36,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:36,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:36,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:57:36,910 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-06-05 04:57:37,113 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 04:57:37,474 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 04:57:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:37,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125656244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:37,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:37,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:57:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83213012] [2021-06-05 04:57:37,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:37,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:37,635 INFO L87 Difference]: Start difference. First operand 261 states and 750 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:37,864 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-06-05 04:57:38,082 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-06-05 04:57:38,343 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-06-05 04:57:38,811 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 129 [2021-06-05 04:57:39,252 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 86 [2021-06-05 04:57:39,744 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 94 [2021-06-05 04:57:40,085 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 89 [2021-06-05 04:57:40,662 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 103 [2021-06-05 04:57:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:40,706 INFO L93 Difference]: Finished difference Result 450 states and 1228 transitions. [2021-06-05 04:57:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:57:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:40,707 INFO L225 Difference]: With dead ends: 450 [2021-06-05 04:57:40,707 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 04:57:40,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3795.7ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:57:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 04:57:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 281. [2021-06-05 04:57:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8321428571428573) internal successors, (793), 280 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 793 transitions. [2021-06-05 04:57:40,710 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 793 transitions. Word has length 20 [2021-06-05 04:57:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:40,710 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 793 transitions. [2021-06-05 04:57:40,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 793 transitions. [2021-06-05 04:57:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:40,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:40,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:40,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1596 [2021-06-05 04:57:40,911 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash -909497162, now seen corresponding path program 9 times [2021-06-05 04:57:40,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:40,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15374459] [2021-06-05 04:57:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:41,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:41,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15374459] [2021-06-05 04:57:41,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15374459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:41,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880852065] [2021-06-05 04:57:41,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:41,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:57:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:57:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:42,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:42,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:42,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:42,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,524 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 136 [2021-06-05 04:57:42,524 INFO L628 ElimStorePlain]: treesize reduction 201, result has 73.1 percent of original size [2021-06-05 04:57:42,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:42,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:42,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,760 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 04:57:42,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:42,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:42,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:42,774 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,991 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 04:57:42,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:42,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:42,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,211 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 04:57:43,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:43,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:43,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,433 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 04:57:43,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:43,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:43,441 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,648 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 04:57:43,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:43,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:43,656 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,861 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 04:57:43,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:43,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:43,869 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:43,874 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,066 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 04:57:44,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:44,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 04:57:44,077 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:833, output treesize:435 [2021-06-05 04:57:44,424 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2021-06-05 04:57:44,812 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_228, get_6, v_prenex_230, v_prenex_220, v_prenex_232, v_prenex_222, v_prenex_234, v_prenex_224, v_prenex_236, v_prenex_226], 1=[get_3, v_prenex_229, v_prenex_219, v_prenex_231, v_prenex_221, v_prenex_233, v_prenex_223, v_prenex_235, v_prenex_225, v_prenex_227]} [2021-06-05 04:57:44,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:44,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:44,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:44,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:44,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:57:44,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:44,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,797 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 148 [2021-06-05 04:57:45,798 INFO L628 ElimStorePlain]: treesize reduction 2812, result has 14.9 percent of original size [2021-06-05 04:57:45,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:45,806 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,998 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 04:57:45,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:46,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:46,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,199 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 04:57:46,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:46,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:46,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,395 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 04:57:46,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:46,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:46,403 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,585 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 04:57:46,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:46,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:46,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,773 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 04:57:46,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:46,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:57:46,780 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,958 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 04:57:46,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:57:46,965 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:47,139 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 04:57:47,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:57:47,146 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:47,321 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 04:57:47,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:47,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:57:47,327 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:47,494 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 04:57:47,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_219 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_231 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_233 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_235 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_225 vanished before elimination [2021-06-05 04:57:47,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-05 04:57:47,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-05 04:57:47,506 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 30 variables, input treesize:3421, output treesize:346 [2021-06-05 04:57:47,794 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 04:57:48,037 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 04:57:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880852065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:48,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:48,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:57:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281602332] [2021-06-05 04:57:48,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:48,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:48,166 INFO L87 Difference]: Start difference. First operand 281 states and 793 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:48,538 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 04:57:48,851 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 04:57:49,488 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 179 [2021-06-05 04:57:50,051 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 103 [2021-06-05 04:57:50,736 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 112 [2021-06-05 04:57:50,939 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 04:57:51,584 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 119 [2021-06-05 04:57:51,807 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 04:57:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:51,833 INFO L93 Difference]: Finished difference Result 514 states and 1358 transitions. [2021-06-05 04:57:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:57:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:51,834 INFO L225 Difference]: With dead ends: 514 [2021-06-05 04:57:51,834 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 04:57:51,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4857.2ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:57:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 04:57:51,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 284. [2021-06-05 04:57:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.862190812720848) internal successors, (810), 283 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 810 transitions. [2021-06-05 04:57:51,838 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 810 transitions. Word has length 20 [2021-06-05 04:57:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:51,838 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 810 transitions. [2021-06-05 04:57:51,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 810 transitions. [2021-06-05 04:57:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:51,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:51,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:52,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1666,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:52,039 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1082744854, now seen corresponding path program 10 times [2021-06-05 04:57:52,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:52,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457977609] [2021-06-05 04:57:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:52,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457977609] [2021-06-05 04:57:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457977609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538490341] [2021-06-05 04:57:52,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:52,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:52,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:52,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:57:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:52,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:52,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:52,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:52,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,977 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-06-05 04:57:52,978 INFO L628 ElimStorePlain]: treesize reduction 156, result has 68.8 percent of original size [2021-06-05 04:57:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:52,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:52,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,101 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 04:57:53,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:53,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:53,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,216 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 04:57:53,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:53,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:53,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,328 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 04:57:53,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:53,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:53,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:53,339 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:53,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:57:53,444 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:53,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:57:53,548 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-06-05 04:57:53,747 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 04:57:53,932 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 04:57:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:54,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538490341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:54,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:54,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:57:54,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105591313] [2021-06-05 04:57:54,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:57:54,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:54,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:57:54,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:54,254 INFO L87 Difference]: Start difference. First operand 284 states and 810 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:54,491 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 04:57:54,709 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 04:57:54,988 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2021-06-05 04:57:55,446 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 136 [2021-06-05 04:57:55,980 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 143 [2021-06-05 04:57:56,239 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2021-06-05 04:57:56,540 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 101 [2021-06-05 04:57:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:56,553 INFO L93 Difference]: Finished difference Result 399 states and 1123 transitions. [2021-06-05 04:57:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:56,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:56,553 INFO L225 Difference]: With dead ends: 399 [2021-06-05 04:57:56,553 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:57:56,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2924.8ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:57:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:57:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 267. [2021-06-05 04:57:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.9022556390977443) internal successors, (772), 266 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 772 transitions. [2021-06-05 04:57:56,556 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 772 transitions. Word has length 20 [2021-06-05 04:57:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:56,556 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 772 transitions. [2021-06-05 04:57:56,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 772 transitions. [2021-06-05 04:57:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:56,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:56,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:56,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-06-05 04:57:56,757 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:56,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1695383606, now seen corresponding path program 11 times [2021-06-05 04:57:56,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:56,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755652314] [2021-06-05 04:57:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:57,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:57,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755652314] [2021-06-05 04:57:57,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755652314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:57,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169783291] [2021-06-05 04:57:57,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:57,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:57,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:57:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:57,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:57,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:57,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:57:57,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:57:57,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:57:57,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:57,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:57,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:57,380 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:57:57,384 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:57,387 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:57,391 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:57,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:57:57,398 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:57:57,402 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:57:57,405 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:57,409 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:57:57,412 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:57:57,416 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:57,515 INFO L628 ElimStorePlain]: treesize reduction 91, result has 62.6 percent of original size [2021-06-05 04:57:57,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 04:57:57,516 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:697, output treesize:152 [2021-06-05 04:57:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:57,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169783291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:57,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:57,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:57:57,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549214197] [2021-06-05 04:57:57,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:57:57,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:57,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:57:57,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:57,846 INFO L87 Difference]: Start difference. First operand 267 states and 772 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:58,498 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 72 [2021-06-05 04:57:58,813 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 81 [2021-06-05 04:57:59,136 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 95 [2021-06-05 04:57:59,532 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 104 [2021-06-05 04:57:59,955 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 107 [2021-06-05 04:57:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:59,971 INFO L93 Difference]: Finished difference Result 498 states and 1377 transitions. [2021-06-05 04:57:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:57:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:59,972 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:57:59,972 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 04:57:59,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2616.9ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:57:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 04:57:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 273. [2021-06-05 04:57:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.8970588235294117) internal successors, (788), 272 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 788 transitions. [2021-06-05 04:57:59,975 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 788 transitions. Word has length 20 [2021-06-05 04:57:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:59,975 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 788 transitions. [2021-06-05 04:57:59,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 788 transitions. [2021-06-05 04:57:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:57:59,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:59,976 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1879,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:00,176 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash 896343602, now seen corresponding path program 12 times [2021-06-05 04:58:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:00,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460782401] [2021-06-05 04:58:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:00,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:00,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460782401] [2021-06-05 04:58:00,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460782401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:00,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217753992] [2021-06-05 04:58:00,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:00,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:58:00,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:00,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:58:00,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:01,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:58:01,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:01,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:01,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:01,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:01,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:01,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,659 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-06-05 04:58:01,660 INFO L628 ElimStorePlain]: treesize reduction 582, result has 46.5 percent of original size [2021-06-05 04:58:01,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:01,666 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:01,672 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:01,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:01,677 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,035 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-05 04:58:02,035 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 04:58:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:02,042 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:02,048 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:02,053 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,377 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-06-05 04:58:02,377 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 04:58:02,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:02,383 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:02,389 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:02,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:02,394 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:02,547 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 04:58:02,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:02,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 04:58:02,557 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1201, output treesize:372 [2021-06-05 04:58:02,719 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 04:58:02,955 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 04:58:03,341 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 130 [2021-06-05 04:58:04,573 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_291, v_prenex_281, v_prenex_293, v_prenex_283, get_6, v_prenex_295, v_prenex_285, v_prenex_297, v_prenex_287, v_prenex_299, v_prenex_289, v_prenex_301, v_prenex_279, v_prenex_312, v_prenex_303, v_prenex_305], 1=[v_prenex_290, v_prenex_280, v_prenex_292, v_prenex_282, v_prenex_294, v_prenex_284, v_prenex_296, v_prenex_286, v_prenex_298, v_prenex_288, v_prenex_300, get_0, v_prenex_302, v_prenex_313, v_prenex_304, v_prenex_306]} [2021-06-05 04:58:04,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:04,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:04,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:04,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:04,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,210 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 130 [2021-06-05 04:58:05,210 INFO L628 ElimStorePlain]: treesize reduction 1348, result has 24.9 percent of original size [2021-06-05 04:58:05,210 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-06-05 04:58:05,211 INFO L518 ElimStorePlain]: Eliminatee v_prenex_293 vanished before elimination [2021-06-05 04:58:05,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:58:05,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,390 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 04:58:05,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:05,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,575 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 04:58:05,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:05,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:05,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,750 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 04:58:05,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:05,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:58:05,756 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:05,910 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 04:58:05,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:05,911 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-05 04:58:05,911 INFO L518 ElimStorePlain]: Eliminatee v_prenex_287 vanished before elimination [2021-06-05 04:58:05,911 INFO L518 ElimStorePlain]: Eliminatee v_prenex_299 vanished before elimination [2021-06-05 04:58:05,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:05,916 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:06,069 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 04:58:06,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:06,069 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-05 04:58:06,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:06,075 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:06,228 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 04:58:06,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:06,228 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-05 04:58:06,228 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-05 04:58:06,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:06,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:06,381 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 04:58:06,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_290 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_280 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_294 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_296 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_298 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_288 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_300 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_302 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_313 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_304 vanished before elimination [2021-06-05 04:58:06,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-06-05 04:58:06,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 32 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 04:58:06,388 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 48 variables, input treesize:1882, output treesize:321 [2021-06-05 04:58:06,650 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 04:58:06,857 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-06-05 04:58:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:06,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217753992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:06,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:06,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:58:06,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388901034] [2021-06-05 04:58:06,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:58:06,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:58:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:58:06,871 INFO L87 Difference]: Start difference. First operand 273 states and 788 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:07,022 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-05 04:58:07,292 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-06-05 04:58:07,841 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 183 [2021-06-05 04:58:08,517 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 187 [2021-06-05 04:58:08,693 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 04:58:09,954 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 241 DAG size of output: 226 [2021-06-05 04:58:10,179 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-05 04:58:11,164 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 208 [2021-06-05 04:58:11,316 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 04:58:12,084 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 222 [2021-06-05 04:58:12,243 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 04:58:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:12,266 INFO L93 Difference]: Finished difference Result 605 states and 1638 transitions. [2021-06-05 04:58:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:58:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:12,267 INFO L225 Difference]: With dead ends: 605 [2021-06-05 04:58:12,267 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 04:58:12,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 6477.1ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:58:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 04:58:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 291. [2021-06-05 04:58:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.893103448275862) internal successors, (839), 290 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 839 transitions. [2021-06-05 04:58:12,271 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 839 transitions. Word has length 20 [2021-06-05 04:58:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:12,271 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 839 transitions. [2021-06-05 04:58:12,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 839 transitions. [2021-06-05 04:58:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:12,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:12,271 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:12,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1900,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:12,471 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:12,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1375628278, now seen corresponding path program 13 times [2021-06-05 04:58:12,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:12,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50764558] [2021-06-05 04:58:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:12,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50764558] [2021-06-05 04:58:12,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50764558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849512398] [2021-06-05 04:58:12,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:12,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:58:12,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:13,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:13,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:13,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:13,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:58:13,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:13,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:13,068 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,300 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 04:58:13,301 INFO L628 ElimStorePlain]: treesize reduction 356, result has 45.6 percent of original size [2021-06-05 04:58:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:13,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:13,311 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:13,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,498 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 04:58:13,498 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 04:58:13,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:13,504 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:13,509 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:13,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:13,513 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:13,653 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 04:58:13,654 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 04:58:13,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:58:13,659 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:757, output treesize:194 [2021-06-05 04:58:14,190 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 04:58:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:14,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849512398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:14,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:14,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:58:14,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141334722] [2021-06-05 04:58:14,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:58:14,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:14,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:58:14,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:58:14,346 INFO L87 Difference]: Start difference. First operand 291 states and 839 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:14,985 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 108 [2021-06-05 04:58:15,113 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-05 04:58:15,599 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112 [2021-06-05 04:58:15,771 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 04:58:16,266 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 122 [2021-06-05 04:58:16,437 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 04:58:16,800 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 128 [2021-06-05 04:58:16,990 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 04:58:17,608 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 137 [2021-06-05 04:58:17,792 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 04:58:17,939 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 04:58:18,484 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 133 [2021-06-05 04:58:18,858 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 139 [2021-06-05 04:58:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:18,905 INFO L93 Difference]: Finished difference Result 685 states and 1809 transitions. [2021-06-05 04:58:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:58:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:18,906 INFO L225 Difference]: With dead ends: 685 [2021-06-05 04:58:18,906 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 04:58:18,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 5000.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:58:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 04:58:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 297. [2021-06-05 04:58:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9087837837837838) internal successors, (861), 296 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 861 transitions. [2021-06-05 04:58:18,910 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 861 transitions. Word has length 20 [2021-06-05 04:58:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:18,910 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 861 transitions. [2021-06-05 04:58:18,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 861 transitions. [2021-06-05 04:58:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:18,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:18,911 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:19,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2150,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:19,117 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash -323092110, now seen corresponding path program 14 times [2021-06-05 04:58:19,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:19,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113419302] [2021-06-05 04:58:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:19,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:19,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113419302] [2021-06-05 04:58:19,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113419302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:19,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493036296] [2021-06-05 04:58:19,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:19,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:19,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:58:19,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:19,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:19,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:19,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:58:19,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:58:19,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:58:19,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:19,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:19,567 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:19,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:19,574 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:19,578 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:19,582 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:19,585 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:19,589 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:58:19,593 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:58:19,596 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:19,600 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:19,604 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:19,608 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:19,706 INFO L628 ElimStorePlain]: treesize reduction 91, result has 62.6 percent of original size [2021-06-05 04:58:19,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 04:58:19,707 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:697, output treesize:152 [2021-06-05 04:58:19,990 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 04:58:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:20,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493036296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:20,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:20,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:58:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722631305] [2021-06-05 04:58:20,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:58:20,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:58:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:58:20,152 INFO L87 Difference]: Start difference. First operand 297 states and 861 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:20,787 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 04:58:21,047 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2021-06-05 04:58:21,508 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 89 [2021-06-05 04:58:22,039 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 97 [2021-06-05 04:58:22,639 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 106 [2021-06-05 04:58:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:22,660 INFO L93 Difference]: Finished difference Result 511 states and 1430 transitions. [2021-06-05 04:58:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:58:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:22,661 INFO L225 Difference]: With dead ends: 511 [2021-06-05 04:58:22,661 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 04:58:22,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2908.4ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:58:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 04:58:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 288. [2021-06-05 04:58:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.916376306620209) internal successors, (837), 287 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 837 transitions. [2021-06-05 04:58:22,664 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 837 transitions. Word has length 20 [2021-06-05 04:58:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:22,665 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 837 transitions. [2021-06-05 04:58:22,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 837 transitions. [2021-06-05 04:58:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:22,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:22,665 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:22,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:22,865 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash 814944546, now seen corresponding path program 15 times [2021-06-05 04:58:22,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:22,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799875981] [2021-06-05 04:58:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:23,219 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 04:58:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:23,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:23,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799875981] [2021-06-05 04:58:23,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799875981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:23,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571022936] [2021-06-05 04:58:23,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:23,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:58:23,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:58:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:24,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:24,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:24,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:24,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:24,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:24,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:24,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:24,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:24,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:24,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:24,843 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 138 [2021-06-05 04:58:24,843 INFO L628 ElimStorePlain]: treesize reduction 245, result has 69.5 percent of original size [2021-06-05 04:58:24,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:24,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:24,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,078 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 04:58:25,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:25,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:25,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:25,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,314 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 04:58:25,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:25,322 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:25,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,536 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 04:58:25,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:25,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:25,546 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:25,556 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,749 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 04:58:25,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:25,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:25,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:25,949 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 04:58:25,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:25,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:25,956 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:26,145 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 04:58:26,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:26,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:26,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:26,152 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:26,342 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 04:58:26,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:26,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 04:58:26,351 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:833, output treesize:435 [2021-06-05 04:58:26,701 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2021-06-05 04:58:27,019 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 116 [2021-06-05 04:58:27,366 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_371, v_prenex_361, get_6, v_prenex_363, v_prenex_365, v_prenex_367, v_prenex_369, v_prenex_359], 1=[v_prenex_370, v_prenex_360, v_prenex_372, v_prenex_362, v_prenex_364, v_prenex_366, get_0, v_prenex_368]} [2021-06-05 04:58:27,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:58:27,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:27,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:27,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:27,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:27,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:27,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:58:27,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:27,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:27,429 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:27,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:27,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:28,063 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 122 [2021-06-05 04:58:28,064 INFO L628 ElimStorePlain]: treesize reduction 2054, result has 16.2 percent of original size [2021-06-05 04:58:28,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:28,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:28,221 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 04:58:28,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:28,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:28,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:28,377 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 04:58:28,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:28,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:28,384 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:28,527 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 04:58:28,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:28,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:58:28,533 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:28,668 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 04:58:28,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:28,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:58:28,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:28,805 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 04:58:28,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:28,810 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:28,939 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 04:58:28,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:28,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:28,945 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:29,069 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 04:58:29,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee v_prenex_370 vanished before elimination [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee v_prenex_360 vanished before elimination [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee v_prenex_372 vanished before elimination [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee v_prenex_362 vanished before elimination [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee v_prenex_364 vanished before elimination [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee v_prenex_366 vanished before elimination [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 04:58:29,070 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-06-05 04:58:29,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 04:58:29,075 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 24 variables, input treesize:2641, output treesize:276 [2021-06-05 04:58:29,281 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 04:58:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:29,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571022936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:29,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:29,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:58:29,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546272776] [2021-06-05 04:58:29,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:58:29,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:58:29,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:58:29,409 INFO L87 Difference]: Start difference. First operand 288 states and 837 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:29,855 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 04:58:30,096 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 04:58:30,656 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 180 [2021-06-05 04:58:31,451 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 199 [2021-06-05 04:58:31,959 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 103 [2021-06-05 04:58:32,453 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 112 [2021-06-05 04:58:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:32,470 INFO L93 Difference]: Finished difference Result 437 states and 1237 transitions. [2021-06-05 04:58:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:58:32,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:32,471 INFO L225 Difference]: With dead ends: 437 [2021-06-05 04:58:32,471 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 04:58:32,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4324.7ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:58:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 04:58:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 294. [2021-06-05 04:58:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9112627986348123) internal successors, (853), 293 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 853 transitions. [2021-06-05 04:58:32,474 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 853 transitions. Word has length 20 [2021-06-05 04:58:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:32,474 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 853 transitions. [2021-06-05 04:58:32,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 853 transitions. [2021-06-05 04:58:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:32,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:32,474 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:32,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:32,675 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1294229222, now seen corresponding path program 16 times [2021-06-05 04:58:32,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:32,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979718788] [2021-06-05 04:58:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:33,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:33,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979718788] [2021-06-05 04:58:33,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979718788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:33,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831958356] [2021-06-05 04:58:33,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:33,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:33,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:58:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:33,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:33,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:33,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:33,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:33,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:33,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:58:33,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,930 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 04:58:33,930 INFO L628 ElimStorePlain]: treesize reduction 418, result has 47.0 percent of original size [2021-06-05 04:58:33,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:33,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:33,943 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:33,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:33,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:33,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:34,207 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 04:58:34,208 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 04:58:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:34,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:34,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:34,213 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:34,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:34,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:34,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:34,218 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:34,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:34,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:34,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:34,459 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 04:58:34,459 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 04:58:34,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:58:34,466 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:901, output treesize:266 [2021-06-05 04:58:35,346 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_390, v_prenex_392, get_6, v_prenex_394, v_prenex_384, v_prenex_396, v_prenex_386, v_prenex_398, v_prenex_388, v_prenex_400, v_prenex_411, v_prenex_402, v_prenex_404, v_prenex_406], 1=[v_prenex_391, v_prenex_393, v_prenex_395, v_prenex_385, v_prenex_397, v_prenex_387, v_prenex_399, v_prenex_389, get_0, v_prenex_401, v_prenex_412, v_prenex_403, v_prenex_405, v_prenex_407]} [2021-06-05 04:58:35,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:35,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:35,819 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 104 [2021-06-05 04:58:35,819 INFO L628 ElimStorePlain]: treesize reduction 1130, result has 23.5 percent of original size [2021-06-05 04:58:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:35,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:35,971 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 04:58:35,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:35,971 INFO L518 ElimStorePlain]: Eliminatee get_6 vanished before elimination [2021-06-05 04:58:35,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_394 vanished before elimination [2021-06-05 04:58:35,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_384 vanished before elimination [2021-06-05 04:58:35,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:35,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:36,110 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 04:58:36,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:36,115 INFO L518 ElimStorePlain]: Eliminatee v_prenex_386 vanished before elimination [2021-06-05 04:58:36,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:36,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:36,251 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 04:58:36,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:36,252 INFO L518 ElimStorePlain]: Eliminatee v_prenex_388 vanished before elimination [2021-06-05 04:58:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:36,257 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:36,385 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 04:58:36,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:36,386 INFO L518 ElimStorePlain]: Eliminatee v_prenex_411 vanished before elimination [2021-06-05 04:58:36,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:36,392 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:36,520 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 04:58:36,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:36,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:58:36,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:36,656 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 04:58:36,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:36,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:58:36,662 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:36,785 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 04:58:36,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_391 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_393 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_395 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_385 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_397 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_387 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_399 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_389 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_401 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_412 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_405 vanished before elimination [2021-06-05 04:58:36,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-06-05 04:58:36,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 28 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 04:58:36,790 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 42 variables, input treesize:1485, output treesize:253 [2021-06-05 04:58:37,133 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 04:58:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:37,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831958356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:37,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:37,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:58:37,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779382474] [2021-06-05 04:58:37,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:58:37,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:58:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:58:37,296 INFO L87 Difference]: Start difference. First operand 294 states and 853 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:37,537 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 04:58:37,807 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-06-05 04:58:38,061 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2021-06-05 04:58:38,742 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 146 [2021-06-05 04:58:38,932 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 50 [2021-06-05 04:58:39,447 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 91 [2021-06-05 04:58:39,615 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 48 [2021-06-05 04:58:40,238 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 103 [2021-06-05 04:58:41,020 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 114 [2021-06-05 04:58:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:41,034 INFO L93 Difference]: Finished difference Result 498 states and 1374 transitions. [2021-06-05 04:58:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:58:41,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:41,035 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:58:41,035 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 04:58:41,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4523.2ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:58:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 04:58:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 304. [2021-06-05 04:58:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.871287128712871) internal successors, (870), 303 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 870 transitions. [2021-06-05 04:58:41,038 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 870 transitions. Word has length 20 [2021-06-05 04:58:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:41,038 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 870 transitions. [2021-06-05 04:58:41,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 870 transitions. [2021-06-05 04:58:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:41,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:41,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:41,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2438,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:41,239 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash -404491166, now seen corresponding path program 17 times [2021-06-05 04:58:41,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:41,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701812456] [2021-06-05 04:58:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:41,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701812456] [2021-06-05 04:58:41,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701812456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:41,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570090471] [2021-06-05 04:58:41,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:41,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:41,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:58:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:41,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:41,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:58:41,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:41,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:41,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:41,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:41,974 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:41,977 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:41,981 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:58:41,985 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:58:41,989 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:58:41,993 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:41,997 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:41,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:42,000 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:42,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:58:42,004 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:42,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:42,008 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:42,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:42,011 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:42,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:42,015 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:42,133 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 04:58:42,133 INFO L628 ElimStorePlain]: treesize reduction 103, result has 63.5 percent of original size [2021-06-05 04:58:42,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 04:58:42,134 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-06-05 04:58:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:42,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570090471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:42,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:42,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:58:42,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939210007] [2021-06-05 04:58:42,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:58:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:58:42,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:58:42,479 INFO L87 Difference]: Start difference. First operand 304 states and 870 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:43,296 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2021-06-05 04:58:43,663 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2021-06-05 04:58:44,053 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 74 [2021-06-05 04:58:44,511 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 81 [2021-06-05 04:58:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:44,522 INFO L93 Difference]: Finished difference Result 435 states and 1225 transitions. [2021-06-05 04:58:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:58:44,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:44,523 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:58:44,523 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:58:44,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2662.2ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:58:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:58:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 291. [2021-06-05 04:58:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9034482758620688) internal successors, (842), 290 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 842 transitions. [2021-06-05 04:58:44,526 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 842 transitions. Word has length 20 [2021-06-05 04:58:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:44,526 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 842 transitions. [2021-06-05 04:58:44,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 842 transitions. [2021-06-05 04:58:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:44,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:44,527 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:44,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2579 [2021-06-05 04:58:44,727 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1829459024, now seen corresponding path program 18 times [2021-06-05 04:58:44,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:44,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67270818] [2021-06-05 04:58:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:44,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:44,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67270818] [2021-06-05 04:58:44,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67270818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:44,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539445633] [2021-06-05 04:58:44,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:44,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:44,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:44,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:58:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:45,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:58:45,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:45,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:45,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:45,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:45,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:45,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,627 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 04:58:45,628 INFO L628 ElimStorePlain]: treesize reduction 352, result has 48.9 percent of original size [2021-06-05 04:58:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:45,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:58:45,638 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:45,643 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,758 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 04:58:45,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:45,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:45,763 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:45,768 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:45,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:45,773 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:45,957 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 04:58:45,958 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 04:58:45,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:58:45,964 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:847, output treesize:238 [2021-06-05 04:58:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:46,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539445633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:46,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:46,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:58:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476210138] [2021-06-05 04:58:46,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:58:46,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:58:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:58:46,500 INFO L87 Difference]: Start difference. First operand 291 states and 842 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:47,101 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 04:58:47,497 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2021-06-05 04:58:47,643 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 04:58:47,919 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 04:58:48,287 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-05 04:58:48,439 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 04:58:48,744 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2021-06-05 04:58:48,883 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 04:58:49,200 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-05 04:58:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:49,201 INFO L93 Difference]: Finished difference Result 536 states and 1457 transitions. [2021-06-05 04:58:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:58:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:49,202 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:58:49,202 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 04:58:49,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2998.4ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:58:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 04:58:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 303. [2021-06-05 04:58:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.903973509933775) internal successors, (877), 302 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 877 transitions. [2021-06-05 04:58:49,205 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 877 transitions. Word has length 20 [2021-06-05 04:58:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:49,205 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 877 transitions. [2021-06-05 04:58:49,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 877 transitions. [2021-06-05 04:58:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:49,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:49,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:49,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:49,406 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash 130738636, now seen corresponding path program 19 times [2021-06-05 04:58:49,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:49,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968382849] [2021-06-05 04:58:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:49,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968382849] [2021-06-05 04:58:49,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968382849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010277637] [2021-06-05 04:58:49,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:58:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:50,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:50,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:58:50,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:50,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:50,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:50,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:50,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:50,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:50,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:58:50,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,050 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2021-06-05 04:58:51,050 INFO L628 ElimStorePlain]: treesize reduction 182, result has 73.1 percent of original size [2021-06-05 04:58:51,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:51,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:51,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:51,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:51,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:51,064 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,253 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 04:58:51,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:51,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:51,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:51,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,449 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 04:58:51,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:51,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:51,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:51,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,643 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 04:58:51,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:51,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:51,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:51,649 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,832 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 04:58:51,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:51,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:51,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:51,839 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:52,020 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 04:58:52,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:52,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:52,027 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:52,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:52,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:52,033 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:52,205 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 04:58:52,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:52,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:52,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:52,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:52,212 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:52,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:52,217 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:52,384 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 04:58:52,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:52,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 04:58:52,395 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:785, output treesize:399 [2021-06-05 04:58:52,741 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2021-06-05 04:58:53,000 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_481, v_prenex_470, v_prenex_460, v_prenex_472, v_prenex_450, v_prenex_462, v_prenex_474, v_prenex_476, v_prenex_466, v_prenex_456, v_prenex_468, v_prenex_458], 1=[v_prenex_459, v_prenex_449, v_prenex_480, v_prenex_471, v_prenex_461, v_prenex_473, v_prenex_475, v_prenex_465, v_prenex_455, v_prenex_467, v_prenex_457, v_prenex_469]} [2021-06-05 04:58:53,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:58:53,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:53,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:53,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,480 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 101 [2021-06-05 04:58:53,480 INFO L628 ElimStorePlain]: treesize reduction 934, result has 29.0 percent of original size [2021-06-05 04:58:53,480 INFO L518 ElimStorePlain]: Eliminatee v_prenex_470 vanished before elimination [2021-06-05 04:58:53,480 INFO L518 ElimStorePlain]: Eliminatee v_prenex_460 vanished before elimination [2021-06-05 04:58:53,480 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-06-05 04:58:53,480 INFO L518 ElimStorePlain]: Eliminatee v_prenex_450 vanished before elimination [2021-06-05 04:58:53,480 INFO L518 ElimStorePlain]: Eliminatee v_prenex_462 vanished before elimination [2021-06-05 04:58:53,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:58:53,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,631 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 04:58:53,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:58:53,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,776 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 04:58:53,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:53,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_466 vanished before elimination [2021-06-05 04:58:53,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:53,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,919 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 04:58:53,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:53,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:53,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:54,061 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 04:58:54,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:54,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:58:54,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:54,197 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 04:58:54,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_459 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_449 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_480 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_471 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_461 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_473 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_475 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_465 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_467 vanished before elimination [2021-06-05 04:58:54,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_457 vanished before elimination [2021-06-05 04:58:54,198 INFO L518 ElimStorePlain]: Eliminatee v_prenex_469 vanished before elimination [2021-06-05 04:58:54,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-05 04:58:54,202 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 36 variables, input treesize:1407, output treesize:283 [2021-06-05 04:58:54,340 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 04:58:54,533 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 04:58:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:54,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010277637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:54,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:54,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:58:54,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953158748] [2021-06-05 04:58:54,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:58:54,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:58:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:58:54,623 INFO L87 Difference]: Start difference. First operand 303 states and 877 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:55,007 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 04:58:55,238 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 04:58:55,744 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 177 [2021-06-05 04:58:56,227 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 113 [2021-06-05 04:58:56,532 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 110 [2021-06-05 04:58:57,063 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 120 [2021-06-05 04:58:57,738 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 129 [2021-06-05 04:58:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:57,766 INFO L93 Difference]: Finished difference Result 500 states and 1379 transitions. [2021-06-05 04:58:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:58:57,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:58:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:57,767 INFO L225 Difference]: With dead ends: 500 [2021-06-05 04:58:57,767 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 04:58:57,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4122.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:58:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 04:58:57,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 314. [2021-06-05 04:58:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.862619808306709) internal successors, (896), 313 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 896 transitions. [2021-06-05 04:58:57,770 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 896 transitions. Word has length 20 [2021-06-05 04:58:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:57,770 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 896 transitions. [2021-06-05 04:58:57,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 896 transitions. [2021-06-05 04:58:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:58:57,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:57,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:57,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:57,973 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash -42509056, now seen corresponding path program 20 times [2021-06-05 04:58:57,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:57,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771838039] [2021-06-05 04:58:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:58,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771838039] [2021-06-05 04:58:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771838039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384153040] [2021-06-05 04:58:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:58,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:58,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:58:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:59,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:59,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:59,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:59,693 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 138 [2021-06-05 04:58:59,694 INFO L628 ElimStorePlain]: treesize reduction 260, result has 68.5 percent of original size [2021-06-05 04:58:59,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:59,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:58:59,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:59,937 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 04:58:59,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:59,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:59,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:58:59,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,178 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 04:59:00,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:00,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:00,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:00,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,426 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 04:59:00,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:00,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:00,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:00,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,667 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 04:59:00,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:00,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,886 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 04:59:00,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:00,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:00,894 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:00,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,113 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 04:59:01,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:01,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:01,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:01,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:01,121 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:01,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:01,128 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,320 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 04:59:01,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:01,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 04:59:01,331 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:833, output treesize:435 [2021-06-05 04:59:01,698 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2021-06-05 04:59:02,053 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 125 [2021-06-05 04:59:02,355 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_531, v_prenex_521, v_prenex_533, v_prenex_511, v_prenex_523, v_prenex_545, v_prenex_513, v_prenex_535, v_prenex_525, v_prenex_515, v_prenex_537, v_prenex_527, v_prenex_517, v_prenex_519, v_prenex_509], 1=[get_3, v_prenex_530, v_prenex_520, v_prenex_532, v_prenex_510, v_prenex_522, v_prenex_544, v_prenex_512, v_prenex_534, v_prenex_524, v_prenex_514, v_prenex_536, v_prenex_526, v_prenex_516, v_prenex_518, v_prenex_508]} [2021-06-05 04:59:02,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:02,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:02,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:02,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,947 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 126 [2021-06-05 04:59:02,947 INFO L628 ElimStorePlain]: treesize reduction 1287, result has 24.2 percent of original size [2021-06-05 04:59:02,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_531 vanished before elimination [2021-06-05 04:59:02,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:02,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,100 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 04:59:03,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:03,100 INFO L518 ElimStorePlain]: Eliminatee v_prenex_533 vanished before elimination [2021-06-05 04:59:03,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:03,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,251 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 04:59:03,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:03,252 INFO L518 ElimStorePlain]: Eliminatee v_prenex_523 vanished before elimination [2021-06-05 04:59:03,252 INFO L518 ElimStorePlain]: Eliminatee v_prenex_545 vanished before elimination [2021-06-05 04:59:03,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:03,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,410 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 04:59:03,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:03,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:03,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,552 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 04:59:03,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:03,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_525 vanished before elimination [2021-06-05 04:59:03,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:03,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,689 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 04:59:03,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:03,689 INFO L518 ElimStorePlain]: Eliminatee v_prenex_537 vanished before elimination [2021-06-05 04:59:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:03,695 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,825 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 04:59:03,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:03,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:03,831 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,959 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:59:03,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_519 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_509 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_530 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_520 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_532 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_522 vanished before elimination [2021-06-05 04:59:03,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_544 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_512 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_534 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_524 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_514 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_536 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_526 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_518 vanished before elimination [2021-06-05 04:59:03,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_508 vanished before elimination [2021-06-05 04:59:03,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 32 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 04:59:03,964 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 48 variables, input treesize:1787, output treesize:294 [2021-06-05 04:59:04,190 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 04:59:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:04,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384153040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:04,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:04,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:04,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559510444] [2021-06-05 04:59:04,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:04,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:04,319 INFO L87 Difference]: Start difference. First operand 314 states and 896 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:04,656 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-06-05 04:59:04,861 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-05 04:59:05,421 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 178 [2021-06-05 04:59:06,719 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 224 DAG size of output: 210 [2021-06-05 04:59:07,150 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2021-06-05 04:59:07,660 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 114 [2021-06-05 04:59:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:07,669 INFO L93 Difference]: Finished difference Result 442 states and 1243 transitions. [2021-06-05 04:59:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:07,670 INFO L225 Difference]: With dead ends: 442 [2021-06-05 04:59:07,670 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:59:07,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4679.0ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:59:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:59:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 294. [2021-06-05 04:59:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9112627986348123) internal successors, (853), 293 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 853 transitions. [2021-06-05 04:59:07,674 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 853 transitions. Word has length 20 [2021-06-05 04:59:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:07,674 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 853 transitions. [2021-06-05 04:59:07,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 853 transitions. [2021-06-05 04:59:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:07,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:07,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:07,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2847 [2021-06-05 04:59:07,875 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash -361470104, now seen corresponding path program 21 times [2021-06-05 04:59:07,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:07,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722624495] [2021-06-05 04:59:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:08,146 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 04:59:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:08,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:08,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722624495] [2021-06-05 04:59:08,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722624495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:08,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630717100] [2021-06-05 04:59:08,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:08,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:59:08,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:59:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:08,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:08,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:08,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:08,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:08,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:59:08,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:08,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:08,648 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:08,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:08,656 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:08,660 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:08,663 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:08,667 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:08,671 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:08,675 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:08,678 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:08,682 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:08,685 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:08,689 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,808 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 04:59:08,808 INFO L628 ElimStorePlain]: treesize reduction 103, result has 63.5 percent of original size [2021-06-05 04:59:08,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 04:59:08,810 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-06-05 04:59:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:09,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630717100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:09,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:09,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:09,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533765892] [2021-06-05 04:59:09,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:09,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:09,321 INFO L87 Difference]: Start difference. First operand 294 states and 853 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:09,670 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 04:59:09,967 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 04:59:10,399 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 100 [2021-06-05 04:59:10,579 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 38 [2021-06-05 04:59:10,999 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 110 [2021-06-05 04:59:11,176 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 40 [2021-06-05 04:59:12,089 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 119 [2021-06-05 04:59:12,896 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 126 [2021-06-05 04:59:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:12,929 INFO L93 Difference]: Finished difference Result 572 states and 1592 transitions. [2021-06-05 04:59:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:12,930 INFO L225 Difference]: With dead ends: 572 [2021-06-05 04:59:12,930 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:59:12,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4286.4ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:59:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:59:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 328. [2021-06-05 04:59:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.8776758409785934) internal successors, (941), 327 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 941 transitions. [2021-06-05 04:59:12,934 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 941 transitions. Word has length 20 [2021-06-05 04:59:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:12,934 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 941 transitions. [2021-06-05 04:59:12,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 941 transitions. [2021-06-05 04:59:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:12,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:12,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:13,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:13,135 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -758387758, now seen corresponding path program 22 times [2021-06-05 04:59:13,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:13,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248565502] [2021-06-05 04:59:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:13,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:13,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248565502] [2021-06-05 04:59:13,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248565502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:13,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785864116] [2021-06-05 04:59:13,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:13,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:13,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:59:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:14,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:14,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:14,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:14,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,399 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2021-06-05 04:59:14,399 INFO L628 ElimStorePlain]: treesize reduction 120, result has 73.9 percent of original size [2021-06-05 04:59:14,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:14,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,532 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 04:59:14,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:14,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:14,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,662 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 04:59:14,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:14,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:14,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,792 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 04:59:14,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:14,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:14,799 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:14,804 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,923 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:59:14,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:14,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:14,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:14,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:14,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,044 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 04:59:15,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:15,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:59:15,051 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:541, output treesize:250 [2021-06-05 04:59:15,256 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 94 [2021-06-05 04:59:15,426 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 04:59:15,687 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_569, get_6, v_prenex_571, v_prenex_573, v_prenex_563, v_prenex_565, v_prenex_567], 1=[get_3, v_prenex_570, v_prenex_572, v_prenex_562, v_prenex_564, v_prenex_566, v_prenex_568]} [2021-06-05 04:59:15,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:15,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:15,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:15,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:15,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:15,740 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:15,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,284 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 104 [2021-06-05 04:59:16,284 INFO L628 ElimStorePlain]: treesize reduction 1734, result has 17.1 percent of original size [2021-06-05 04:59:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:16,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,428 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 04:59:16,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:16,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:59:16,435 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,570 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 04:59:16,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:16,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:16,577 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,709 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 04:59:16,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:16,715 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,842 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 04:59:16,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:16,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:59:16,848 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,973 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 04:59:16,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:16,979 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:17,106 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 04:59:17,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:17,106 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 04:59:17,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-06-05 04:59:17,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_572 vanished before elimination [2021-06-05 04:59:17,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-06-05 04:59:17,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_564 vanished before elimination [2021-06-05 04:59:17,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_566 vanished before elimination [2021-06-05 04:59:17,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_568 vanished before elimination [2021-06-05 04:59:17,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 04:59:17,110 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2293, output treesize:253 [2021-06-05 04:59:17,239 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 04:59:17,436 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 04:59:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785864116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:17,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:17,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524747269] [2021-06-05 04:59:17,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:17,600 INFO L87 Difference]: Start difference. First operand 328 states and 941 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:18,056 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-06-05 04:59:18,541 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-06-05 04:59:19,110 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 126 [2021-06-05 04:59:19,725 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 136 [2021-06-05 04:59:20,513 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 149 [2021-06-05 04:59:21,449 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 159 [2021-06-05 04:59:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:21,467 INFO L93 Difference]: Finished difference Result 548 states and 1491 transitions. [2021-06-05 04:59:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:21,468 INFO L225 Difference]: With dead ends: 548 [2021-06-05 04:59:21,468 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 04:59:21,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4776.5ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:59:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 04:59:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 334. [2021-06-05 04:59:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.873873873873874) internal successors, (957), 333 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 957 transitions. [2021-06-05 04:59:21,472 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 957 transitions. Word has length 20 [2021-06-05 04:59:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:21,472 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 957 transitions. [2021-06-05 04:59:21,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 957 transitions. [2021-06-05 04:59:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:21,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:21,472 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:21,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3039 [2021-06-05 04:59:21,673 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:21,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1837859150, now seen corresponding path program 23 times [2021-06-05 04:59:21,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:21,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76302689] [2021-06-05 04:59:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:22,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:22,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76302689] [2021-06-05 04:59:22,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76302689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:22,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251803235] [2021-06-05 04:59:22,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:22,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:59:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:22,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:22,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:22,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:22,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:22,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:59:22,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:22,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:22,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:22,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:22,334 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:22,338 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:22,342 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:22,345 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:22,349 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:22,353 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:22,356 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:22,360 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:22,363 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:22,367 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,466 INFO L628 ElimStorePlain]: treesize reduction 97, result has 61.0 percent of original size [2021-06-05 04:59:22,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 04:59:22,470 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:697, output treesize:152 [2021-06-05 04:59:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:22,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251803235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:22,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:22,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:59:22,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828690480] [2021-06-05 04:59:22,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:59:22,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:22,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:59:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:59:22,885 INFO L87 Difference]: Start difference. First operand 334 states and 957 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:23,496 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 04:59:23,774 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2021-06-05 04:59:24,257 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2021-06-05 04:59:24,717 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 93 [2021-06-05 04:59:25,251 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 99 [2021-06-05 04:59:25,921 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 104 [2021-06-05 04:59:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:25,947 INFO L93 Difference]: Finished difference Result 580 states and 1567 transitions. [2021-06-05 04:59:25,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:25,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:25,948 INFO L225 Difference]: With dead ends: 580 [2021-06-05 04:59:25,948 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 04:59:25,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3553.7ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:59:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 04:59:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 327. [2021-06-05 04:59:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.861963190184049) internal successors, (933), 326 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 933 transitions. [2021-06-05 04:59:25,952 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 933 transitions. Word has length 20 [2021-06-05 04:59:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:25,952 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 933 transitions. [2021-06-05 04:59:25,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 933 transitions. [2021-06-05 04:59:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:25,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:25,952 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:26,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3166 [2021-06-05 04:59:26,153 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1664611458, now seen corresponding path program 24 times [2021-06-05 04:59:26,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:26,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359715521] [2021-06-05 04:59:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:26,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:26,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359715521] [2021-06-05 04:59:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359715521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916015085] [2021-06-05 04:59:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:26,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:59:26,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:59:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:26,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:26,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:26,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:26,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:26,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:26,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,059 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 04:59:27,059 INFO L628 ElimStorePlain]: treesize reduction 141, result has 68.0 percent of original size [2021-06-05 04:59:27,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:27,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:27,070 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:27,164 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:27,169 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:27,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:27,263 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:27,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:27,346 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:27,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:27,427 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:27,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:59:27,508 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-06-05 04:59:27,661 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 04:59:27,962 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-06-05 04:59:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:28,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916015085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:28,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:28,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:28,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996639452] [2021-06-05 04:59:28,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:28,242 INFO L87 Difference]: Start difference. First operand 327 states and 933 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:28,950 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 04:59:29,113 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 04:59:29,436 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-06-05 04:59:29,670 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 04:59:29,831 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 04:59:30,097 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 04:59:30,269 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-06-05 04:59:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:30,394 INFO L93 Difference]: Finished difference Result 630 states and 1709 transitions. [2021-06-05 04:59:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:59:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:30,395 INFO L225 Difference]: With dead ends: 630 [2021-06-05 04:59:30,395 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 04:59:30,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2678.2ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:59:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 04:59:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 327. [2021-06-05 04:59:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.914110429447853) internal successors, (950), 326 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 950 transitions. [2021-06-05 04:59:30,399 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 950 transitions. Word has length 20 [2021-06-05 04:59:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:30,399 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 950 transitions. [2021-06-05 04:59:30,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 950 transitions. [2021-06-05 04:59:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:30,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:30,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:30,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3188 [2021-06-05 04:59:30,600 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:30,600 INFO L82 PathProgramCache]: Analyzing trace with hash -678810648, now seen corresponding path program 25 times [2021-06-05 04:59:30,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:30,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407664029] [2021-06-05 04:59:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:30,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:30,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407664029] [2021-06-05 04:59:30,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407664029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:30,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871181096] [2021-06-05 04:59:30,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:30,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:59:30,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:31,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:31,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,566 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-06-05 04:59:31,567 INFO L628 ElimStorePlain]: treesize reduction 171, result has 67.2 percent of original size [2021-06-05 04:59:31,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:31,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,702 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 04:59:31,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:31,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:31,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,836 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 04:59:31,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:31,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:31,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:31,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,964 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:59:31,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:31,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:31,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:32,085 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 04:59:32,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:32,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:32,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:32,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:32,091 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:32,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:32,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:32,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:32,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:32,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:59:32,201 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-06-05 04:59:32,402 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 04:59:32,576 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-05 04:59:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:32,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871181096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:32,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:32,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:32,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639983638] [2021-06-05 04:59:32,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:32,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:32,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:32,875 INFO L87 Difference]: Start difference. First operand 327 states and 950 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:33,287 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 04:59:33,571 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-06-05 04:59:33,969 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 125 [2021-06-05 04:59:34,481 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 130 [2021-06-05 04:59:34,679 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 04:59:34,899 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2021-06-05 04:59:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:34,911 INFO L93 Difference]: Finished difference Result 472 states and 1340 transitions. [2021-06-05 04:59:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:34,911 INFO L225 Difference]: With dead ends: 472 [2021-06-05 04:59:34,911 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 04:59:34,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2638.8ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:59:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 04:59:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 333. [2021-06-05 04:59:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9096385542168677) internal successors, (966), 332 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 966 transitions. [2021-06-05 04:59:34,915 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 966 transitions. Word has length 20 [2021-06-05 04:59:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:34,915 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 966 transitions. [2021-06-05 04:59:34,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 966 transitions. [2021-06-05 04:59:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:34,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:34,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:35,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-06-05 04:59:35,116 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash -199525972, now seen corresponding path program 26 times [2021-06-05 04:59:35,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:35,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457011624] [2021-06-05 04:59:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:35,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:35,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457011624] [2021-06-05 04:59:35,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457011624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:35,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863747977] [2021-06-05 04:59:35,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:35,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:35,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:59:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:36,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:36,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:36,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,437 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2021-06-05 04:59:36,437 INFO L628 ElimStorePlain]: treesize reduction 174, result has 69.6 percent of original size [2021-06-05 04:59:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:36,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:36,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,596 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 04:59:36,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:36,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:36,603 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:36,609 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,744 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 04:59:36,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:36,751 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,888 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 04:59:36,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:36,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:36,895 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,036 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:59:37,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:37,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:37,042 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,173 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 04:59:37,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:37,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:59:37,179 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:601, output treesize:295 [2021-06-05 04:59:37,422 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 98 [2021-06-05 04:59:37,695 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_613, v_prenex_615, v_prenex_617, get_6, v_prenex_619, v_prenex_621, v_prenex_623], 1=[v_prenex_624, v_prenex_614, v_prenex_616, v_prenex_618, get_0, v_prenex_620, v_prenex_622]} [2021-06-05 04:59:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:59:37,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:37,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:37,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:37,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:37,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:37,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,261 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 103 [2021-06-05 04:59:38,261 INFO L628 ElimStorePlain]: treesize reduction 1763, result has 16.8 percent of original size [2021-06-05 04:59:38,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:59:38,267 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,407 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 04:59:38,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:38,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:38,413 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,550 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 04:59:38,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:38,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:38,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,694 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 04:59:38,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:38,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:59:38,700 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,829 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 04:59:38,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:38,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:38,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,959 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 04:59:38,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:38,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:38,964 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,092 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 04:59:39,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:39,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_624 vanished before elimination [2021-06-05 04:59:39,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_614 vanished before elimination [2021-06-05 04:59:39,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_616 vanished before elimination [2021-06-05 04:59:39,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-06-05 04:59:39,092 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 04:59:39,093 INFO L518 ElimStorePlain]: Eliminatee v_prenex_620 vanished before elimination [2021-06-05 04:59:39,093 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-06-05 04:59:39,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 04:59:39,097 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2293, output treesize:253 [2021-06-05 04:59:39,402 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-06-05 04:59:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:39,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863747977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:39,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:39,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:39,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963009171] [2021-06-05 04:59:39,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:39,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:39,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:39,488 INFO L87 Difference]: Start difference. First operand 333 states and 966 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:39,945 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-05 04:59:40,263 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2021-06-05 04:59:40,772 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 142 [2021-06-05 04:59:41,129 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-06-05 04:59:41,542 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 94 [2021-06-05 04:59:42,049 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 106 [2021-06-05 04:59:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:42,064 INFO L93 Difference]: Finished difference Result 493 states and 1383 transitions. [2021-06-05 04:59:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:42,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:42,065 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:59:42,065 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:59:42,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3338.9ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:59:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:59:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 336. [2021-06-05 04:59:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.9074626865671642) internal successors, (974), 335 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 974 transitions. [2021-06-05 04:59:42,068 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 974 transitions. Word has length 20 [2021-06-05 04:59:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:42,069 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 974 transitions. [2021-06-05 04:59:42,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 974 transitions. [2021-06-05 04:59:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:42,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:42,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:42,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:42,269 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1898246360, now seen corresponding path program 27 times [2021-06-05 04:59:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:42,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580373500] [2021-06-05 04:59:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:42,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580373500] [2021-06-05 04:59:42,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580373500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727952874] [2021-06-05 04:59:42,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:42,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:59:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:43,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:43,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:43,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:43,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,296 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-06-05 04:59:43,297 INFO L628 ElimStorePlain]: treesize reduction 156, result has 68.8 percent of original size [2021-06-05 04:59:43,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:43,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:43,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,428 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 04:59:43,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:43,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:43,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:43,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,545 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:59:43,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:43,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:43,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,654 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 04:59:43,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:43,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:43,660 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:43,766 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,868 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 04:59:43,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:43,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:59:43,874 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-06-05 04:59:44,074 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-06-05 04:59:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:44,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727952874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:44,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:44,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:44,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348092555] [2021-06-05 04:59:44,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:44,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:44,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:44,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:44,495 INFO L87 Difference]: Start difference. First operand 336 states and 974 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:44,926 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 04:59:45,203 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-05 04:59:45,628 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 131 [2021-06-05 04:59:45,893 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-05 04:59:46,279 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2021-06-05 04:59:46,721 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2021-06-05 04:59:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:46,746 INFO L93 Difference]: Finished difference Result 470 states and 1341 transitions. [2021-06-05 04:59:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:46,747 INFO L225 Difference]: With dead ends: 470 [2021-06-05 04:59:46,747 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 04:59:46,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2793.7ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:59:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 04:59:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 330. [2021-06-05 04:59:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.911854103343465) internal successors, (958), 329 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 958 transitions. [2021-06-05 04:59:46,750 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 958 transitions. Word has length 20 [2021-06-05 04:59:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:46,750 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 958 transitions. [2021-06-05 04:59:46,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 958 transitions. [2021-06-05 04:59:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:46,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:46,751 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:46,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3466,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:46,951 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 335703830, now seen corresponding path program 28 times [2021-06-05 04:59:46,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:46,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999502855] [2021-06-05 04:59:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:47,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:47,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999502855] [2021-06-05 04:59:47,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999502855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:47,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467874926] [2021-06-05 04:59:47,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:47,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:47,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:47,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:59:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:47,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:47,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:47,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:47,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:47,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:47,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,278 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 102 [2021-06-05 04:59:48,278 INFO L628 ElimStorePlain]: treesize reduction 130, result has 74.8 percent of original size [2021-06-05 04:59:48,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:48,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,449 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 04:59:48,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:48,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:48,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,617 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 04:59:48,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:48,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:48,624 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,774 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 04:59:48,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:48,787 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:48,793 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,937 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 04:59:48,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:48,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:48,943 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:48,949 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:49,079 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 04:59:49,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:49,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:59:49,087 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:601, output treesize:295 [2021-06-05 04:59:49,336 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 98 [2021-06-05 04:59:50,108 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_680, get_6, v_prenex_670, v_prenex_660, v_prenex_672, v_prenex_662, v_prenex_674, v_prenex_652, v_prenex_664, v_prenex_654, v_prenex_666, v_prenex_656, v_prenex_668, v_prenex_658], 1=[get_3, v_prenex_671, v_prenex_661, v_prenex_673, v_prenex_651, v_prenex_663, v_prenex_653, v_prenex_665, v_prenex_655, v_prenex_667, v_prenex_679, v_prenex_657, v_prenex_669, v_prenex_659]} [2021-06-05 04:59:50,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:59:50,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:59:50,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:59:50,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,624 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 105 [2021-06-05 04:59:50,625 INFO L628 ElimStorePlain]: treesize reduction 1098, result has 26.4 percent of original size [2021-06-05 04:59:50,625 INFO L518 ElimStorePlain]: Eliminatee get_6 vanished before elimination [2021-06-05 04:59:50,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:50,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,788 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 04:59:50,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:50,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_660 vanished before elimination [2021-06-05 04:59:50,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:50,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,949 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 04:59:50,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:50,950 INFO L518 ElimStorePlain]: Eliminatee v_prenex_662 vanished before elimination [2021-06-05 04:59:50,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:50,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:51,105 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 04:59:51,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:51,105 INFO L518 ElimStorePlain]: Eliminatee v_prenex_652 vanished before elimination [2021-06-05 04:59:51,105 INFO L518 ElimStorePlain]: Eliminatee v_prenex_664 vanished before elimination [2021-06-05 04:59:51,105 INFO L518 ElimStorePlain]: Eliminatee v_prenex_654 vanished before elimination [2021-06-05 04:59:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:59:51,111 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:51,261 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:59:51,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:51,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:59:51,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:51,408 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 04:59:51,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:51,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:59:51,414 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:51,551 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 04:59:51,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_658 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_671 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_661 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_673 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_651 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_663 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_653 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_665 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_655 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_667 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_679 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_657 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_669 vanished before elimination [2021-06-05 04:59:51,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_659 vanished before elimination [2021-06-05 04:59:51,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 28 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 04:59:51,557 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 42 variables, input treesize:1587, output treesize:292 [2021-06-05 04:59:51,701 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-05 04:59:51,897 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-05 04:59:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:52,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467874926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:52,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:52,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506011087] [2021-06-05 04:59:52,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:52,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:52,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:52,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:52,010 INFO L87 Difference]: Start difference. First operand 330 states and 958 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:52,484 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 04:59:52,781 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-05 04:59:53,198 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 132 [2021-06-05 04:59:53,564 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-06-05 04:59:53,995 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 87 [2021-06-05 04:59:54,487 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 96 [2021-06-05 04:59:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:54,501 INFO L93 Difference]: Finished difference Result 500 states and 1398 transitions. [2021-06-05 04:59:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:54,502 INFO L225 Difference]: With dead ends: 500 [2021-06-05 04:59:54,502 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 04:59:54,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3316.8ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:59:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 04:59:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 336. [2021-06-05 04:59:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.9074626865671642) internal successors, (974), 335 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 974 transitions. [2021-06-05 04:59:54,506 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 974 transitions. Word has length 20 [2021-06-05 04:59:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:54,506 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 974 transitions. [2021-06-05 04:59:54,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 974 transitions. [2021-06-05 04:59:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:54,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:54,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:54,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-06-05 04:59:54,707 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:54,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1363016558, now seen corresponding path program 29 times [2021-06-05 04:59:54,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:54,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111602652] [2021-06-05 04:59:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111602652] [2021-06-05 04:59:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111602652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478715790] [2021-06-05 04:59:54,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:55,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:59:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:55,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:59:55,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:55,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:55,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:55,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:55,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:55,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:55,267 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:55,271 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:55,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:55,279 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:55,283 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:55,287 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:55,291 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:55,295 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:55,299 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:55,302 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:55,306 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:59:55,310 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,426 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 04:59:55,426 INFO L628 ElimStorePlain]: treesize reduction 103, result has 63.5 percent of original size [2021-06-05 04:59:55,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 04:59:55,428 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-06-05 04:59:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:55,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478715790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:55,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:55,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 04:59:55,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810354366] [2021-06-05 04:59:55,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:59:55,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:55,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:59:55,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:59:55,750 INFO L87 Difference]: Start difference. First operand 336 states and 974 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:56,372 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-06-05 04:59:56,811 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 04:59:57,171 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 04:59:57,322 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 04:59:57,531 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 04:59:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:57,623 INFO L93 Difference]: Finished difference Result 614 states and 1671 transitions. [2021-06-05 04:59:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:59:57,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:59:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:57,623 INFO L225 Difference]: With dead ends: 614 [2021-06-05 04:59:57,624 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 04:59:57,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2234.9ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:59:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 04:59:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 336. [2021-06-05 04:59:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.9074626865671642) internal successors, (974), 335 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 974 transitions. [2021-06-05 04:59:57,628 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 974 transitions. Word has length 20 [2021-06-05 04:59:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:57,628 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 974 transitions. [2021-06-05 04:59:57,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 974 transitions. [2021-06-05 04:59:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:59:57,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:57,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:57,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-06-05 04:59:57,829 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1536264250, now seen corresponding path program 30 times [2021-06-05 04:59:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:57,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463159934] [2021-06-05 04:59:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:58,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:58,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463159934] [2021-06-05 04:59:58,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463159934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:58,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662102546] [2021-06-05 04:59:58,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:58,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:59:58,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:58,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:59:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:58,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 04:59:58,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:58,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:58,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 04:59:58,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:59:58,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 04:59:58,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,816 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 04:59:58,817 INFO L628 ElimStorePlain]: treesize reduction 352, result has 46.6 percent of original size [2021-06-05 04:59:58,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:58,823 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:58,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:58,834 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,942 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 04:59:58,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:58,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 04:59:58,948 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:58,953 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:58,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:59:58,957 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:59,146 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 04:59:59,146 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 04:59:59,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 04:59:59,152 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:847, output treesize:239 [2021-06-05 04:59:59,453 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 04:59:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662102546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:59:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271672453] [2021-06-05 04:59:59,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:59:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:59:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:59,733 INFO L87 Difference]: Start difference. First operand 336 states and 974 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:00,179 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 05:00:00,467 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-05 05:00:00,831 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 124 [2021-06-05 05:00:01,425 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 131 [2021-06-05 05:00:01,670 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-05 05:00:01,975 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-05 05:00:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:02,007 INFO L93 Difference]: Finished difference Result 477 states and 1356 transitions. [2021-06-05 05:00:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:00:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:02,008 INFO L225 Difference]: With dead ends: 477 [2021-06-05 05:00:02,008 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 05:00:02,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2714.8ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:00:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 05:00:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 336. [2021-06-05 05:00:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.9074626865671642) internal successors, (974), 335 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 974 transitions. [2021-06-05 05:00:02,011 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 974 transitions. Word has length 20 [2021-06-05 05:00:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:02,012 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 974 transitions. [2021-06-05 05:00:02,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 974 transitions. [2021-06-05 05:00:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:02,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:02,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:02,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3811,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:02,213 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1281321126, now seen corresponding path program 31 times [2021-06-05 05:00:02,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:02,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281215639] [2021-06-05 05:00:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:02,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281215639] [2021-06-05 05:00:02,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281215639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:02,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568213707] [2021-06-05 05:00:02,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:02,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:00:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:03,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:03,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:03,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,239 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-05 05:00:03,240 INFO L628 ElimStorePlain]: treesize reduction 140, result has 67.9 percent of original size [2021-06-05 05:00:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:03,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,348 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:00:03,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:03,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:03,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,475 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:00:03,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:03,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:03,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,581 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 05:00:03,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:03,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:03,587 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:03,591 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:03,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:03,689 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:03,693 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:03,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:00:03,776 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:00:03,944 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:00:04,159 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-06-05 05:00:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:04,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568213707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:04,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:04,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:00:04,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787479103] [2021-06-05 05:00:04,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:04,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:04,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:04,852 INFO L87 Difference]: Start difference. First operand 336 states and 974 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:05,389 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 112 [2021-06-05 05:00:05,943 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 127 [2021-06-05 05:00:06,813 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 135 [2021-06-05 05:00:07,935 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 189 DAG size of output: 142 [2021-06-05 05:00:09,357 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 191 DAG size of output: 152 [2021-06-05 05:00:10,491 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 202 DAG size of output: 159 [2021-06-05 05:00:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:10,523 INFO L93 Difference]: Finished difference Result 622 states and 1708 transitions. [2021-06-05 05:00:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:00:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:10,524 INFO L225 Difference]: With dead ends: 622 [2021-06-05 05:00:10,524 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 05:00:10,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6476.6ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:00:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 05:00:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 354. [2021-06-05 05:00:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.903682719546742) internal successors, (1025), 353 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1025 transitions. [2021-06-05 05:00:10,529 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1025 transitions. Word has length 20 [2021-06-05 05:00:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:10,529 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1025 transitions. [2021-06-05 05:00:10,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1025 transitions. [2021-06-05 05:00:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:10,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:10,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:10,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3881 [2021-06-05 05:00:10,731 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash 884403472, now seen corresponding path program 32 times [2021-06-05 05:00:10,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:10,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96424557] [2021-06-05 05:00:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:11,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:11,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96424557] [2021-06-05 05:00:11,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96424557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:11,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090149609] [2021-06-05 05:00:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:11,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:11,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:00:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:11,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:11,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:11,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:11,409 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:11,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:11,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,429 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:11,433 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,438 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:11,443 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:11,448 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:00:11,452 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:11,457 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,462 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:11,467 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,473 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:11,478 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:00:11,483 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:11,487 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,492 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:11,496 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:11,501 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:11,506 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,510 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:11,514 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,518 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,523 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,527 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,532 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:11,536 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:11,541 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:11,545 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:11,550 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,725 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 05:00:11,725 INFO L628 ElimStorePlain]: treesize reduction 324, result has 38.5 percent of original size [2021-06-05 05:00:11,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:00:11,727 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1765, output treesize:203 [2021-06-05 05:00:12,094 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-05 05:00:12,393 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 05:00:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:12,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090149609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:12,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:12,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:00:12,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705797338] [2021-06-05 05:00:12,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:12,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:12,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:12,605 INFO L87 Difference]: Start difference. First operand 354 states and 1025 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:12,867 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 05:00:13,335 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 05:00:13,870 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-05 05:00:14,490 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2021-06-05 05:00:15,272 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2021-06-05 05:00:16,085 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 104 [2021-06-05 05:00:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:16,105 INFO L93 Difference]: Finished difference Result 634 states and 1745 transitions. [2021-06-05 05:00:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:00:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:16,106 INFO L225 Difference]: With dead ends: 634 [2021-06-05 05:00:16,106 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 05:00:16,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4448.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:00:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 05:00:16,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 354. [2021-06-05 05:00:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.903682719546742) internal successors, (1025), 353 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1025 transitions. [2021-06-05 05:00:16,111 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1025 transitions. Word has length 20 [2021-06-05 05:00:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:16,111 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1025 transitions. [2021-06-05 05:00:16,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1025 transitions. [2021-06-05 05:00:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:16,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:16,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:16,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3958,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:16,312 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:16,312 INFO L82 PathProgramCache]: Analyzing trace with hash -814316916, now seen corresponding path program 33 times [2021-06-05 05:00:16,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:16,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182263285] [2021-06-05 05:00:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:16,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182263285] [2021-06-05 05:00:16,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182263285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794676898] [2021-06-05 05:00:16,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:16,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:00:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:00:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:17,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:17,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:17,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:17,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,288 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2021-06-05 05:00:17,288 INFO L628 ElimStorePlain]: treesize reduction 98, result has 73.2 percent of original size [2021-06-05 05:00:17,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:17,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,396 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:00:17,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:17,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:17,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:17,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:17,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:17,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:17,603 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:17,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:17,693 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:17,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:17,697 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:17,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:17,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:00:17,781 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:00:17,939 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:00:18,131 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-06-05 05:00:18,679 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 05:00:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:18,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794676898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:18,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:18,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:00:18,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995963255] [2021-06-05 05:00:18,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:18,884 INFO L87 Difference]: Start difference. First operand 354 states and 1025 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:19,469 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2021-06-05 05:00:20,018 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 134 [2021-06-05 05:00:20,673 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 133 [2021-06-05 05:00:21,546 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 143 [2021-06-05 05:00:22,519 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 148 [2021-06-05 05:00:23,579 WARN L205 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 155 [2021-06-05 05:00:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:23,608 INFO L93 Difference]: Finished difference Result 641 states and 1761 transitions. [2021-06-05 05:00:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:00:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:23,609 INFO L225 Difference]: With dead ends: 641 [2021-06-05 05:00:23,609 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 05:00:23,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 5525.7ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:00:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 05:00:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 357. [2021-06-05 05:00:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9101123595505616) internal successors, (1036), 356 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1036 transitions. [2021-06-05 05:00:23,613 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1036 transitions. Word has length 20 [2021-06-05 05:00:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:23,613 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1036 transitions. [2021-06-05 05:00:23,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1036 transitions. [2021-06-05 05:00:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:23,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:23,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:23,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3986 [2021-06-05 05:00:23,814 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:23,814 INFO L82 PathProgramCache]: Analyzing trace with hash -987564608, now seen corresponding path program 34 times [2021-06-05 05:00:23,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:23,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360207728] [2021-06-05 05:00:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:24,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:24,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360207728] [2021-06-05 05:00:24,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360207728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:24,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230748736] [2021-06-05 05:00:24,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:24,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:24,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:24,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:00:24,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:24,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:24,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:24,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:24,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:24,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:24,966 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-06-05 05:00:24,966 INFO L628 ElimStorePlain]: treesize reduction 118, result has 74.1 percent of original size [2021-06-05 05:00:24,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:24,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:24,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:24,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:24,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:25,095 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:00:25,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:25,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:25,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:25,214 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 05:00:25,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:25,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:25,219 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:25,330 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 05:00:25,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:25,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:25,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:25,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:25,336 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:25,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:25,340 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:25,446 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 05:00:25,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:25,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:25,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:25,556 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 05:00:25,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:25,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:00:25,563 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:537, output treesize:247 [2021-06-05 05:00:25,754 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 05:00:26,000 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-06-05 05:00:26,233 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 05:00:26,487 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-05 05:00:27,137 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_757, v_prenex_759, get_6, v_prenex_761, v_prenex_763], 1=[v_prenex_756, get_3, v_prenex_758, v_prenex_760, v_prenex_762]} [2021-06-05 05:00:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:27,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:27,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:27,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:27,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:27,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:27,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,584 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 82 [2021-06-05 05:00:27,585 INFO L628 ElimStorePlain]: treesize reduction 1228, result has 20.6 percent of original size [2021-06-05 05:00:27,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:00:27,590 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,700 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 05:00:27,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:27,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:00:27,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,816 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 05:00:27,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:27,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:00:27,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:27,927 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 05:00:27,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:27,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:27,932 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:28,033 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 05:00:28,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:28,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_756 vanished before elimination [2021-06-05 05:00:28,033 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:00:28,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_758 vanished before elimination [2021-06-05 05:00:28,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_760 vanished before elimination [2021-06-05 05:00:28,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_762 vanished before elimination [2021-06-05 05:00:28,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 05:00:28,036 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 15 variables, input treesize:1750, output treesize:237 [2021-06-05 05:00:28,237 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-05 05:00:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:28,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230748736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:28,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:28,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:00:28,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438195555] [2021-06-05 05:00:28,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:28,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:28,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:28,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:28,378 INFO L87 Difference]: Start difference. First operand 357 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:29,007 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 131 [2021-06-05 05:00:29,865 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 143 [2021-06-05 05:00:30,182 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-06-05 05:00:31,001 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 146 [2021-06-05 05:00:31,452 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 112 [2021-06-05 05:00:32,633 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 224 DAG size of output: 169 [2021-06-05 05:00:33,027 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 104 [2021-06-05 05:00:34,135 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 199 DAG size of output: 168 [2021-06-05 05:00:34,406 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2021-06-05 05:00:35,628 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 220 DAG size of output: 181 [2021-06-05 05:00:35,876 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2021-06-05 05:00:36,077 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-05 05:00:36,252 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-06-05 05:00:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:36,297 INFO L93 Difference]: Finished difference Result 914 states and 2470 transitions. [2021-06-05 05:00:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:36,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:36,298 INFO L225 Difference]: With dead ends: 914 [2021-06-05 05:00:36,298 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 05:00:36,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 8801.4ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:00:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 05:00:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 386. [2021-06-05 05:00:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.9740259740259742) internal successors, (1145), 385 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1145 transitions. [2021-06-05 05:00:36,304 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1145 transitions. Word has length 20 [2021-06-05 05:00:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:36,304 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1145 transitions. [2021-06-05 05:00:36,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1145 transitions. [2021-06-05 05:00:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:36,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:36,304 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:36,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 05:00:36,505 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1985393222, now seen corresponding path program 35 times [2021-06-05 05:00:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:36,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946577690] [2021-06-05 05:00:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:36,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:36,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946577690] [2021-06-05 05:00:36,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946577690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:36,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065875421] [2021-06-05 05:00:36,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:36,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:36,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:00:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:36,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:36,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:36,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:36,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:36,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:36,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:37,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:37,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,012 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,016 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:37,020 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:37,024 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:37,029 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:37,033 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:37,037 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:37,041 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,045 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:37,049 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:37,053 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:37,057 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,061 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,069 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:37,074 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:37,077 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:37,081 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:37,085 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:37,089 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,092 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:37,096 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:00:37,100 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,104 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:37,108 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:37,112 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:37,116 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:37,119 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:37,123 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:00:37,127 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:37,130 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:37,133 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:37,255 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 05:00:37,255 INFO L628 ElimStorePlain]: treesize reduction 268, result has 35.7 percent of original size [2021-06-05 05:00:37,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:00:37,257 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:00:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:37,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065875421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:37,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:37,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:00:37,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361883881] [2021-06-05 05:00:37,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:00:37,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:00:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:00:37,727 INFO L87 Difference]: Start difference. First operand 386 states and 1145 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:38,153 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 05:00:38,472 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2021-06-05 05:00:38,845 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 86 [2021-06-05 05:00:39,226 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 96 [2021-06-05 05:00:39,687 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 103 [2021-06-05 05:00:40,223 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 110 [2021-06-05 05:00:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:40,248 INFO L93 Difference]: Finished difference Result 631 states and 1752 transitions. [2021-06-05 05:00:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:00:40,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:40,249 INFO L225 Difference]: With dead ends: 631 [2021-06-05 05:00:40,249 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 05:00:40,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2957.4ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:00:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 05:00:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 390. [2021-06-05 05:00:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.979434447300771) internal successors, (1159), 389 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1159 transitions. [2021-06-05 05:00:40,253 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1159 transitions. Word has length 20 [2021-06-05 05:00:40,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:40,254 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1159 transitions. [2021-06-05 05:00:40,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1159 transitions. [2021-06-05 05:00:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:40,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:40,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:40,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:40,454 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash -809196446, now seen corresponding path program 36 times [2021-06-05 05:00:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:40,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767965455] [2021-06-05 05:00:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:40,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:40,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767965455] [2021-06-05 05:00:40,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767965455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:40,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102619936] [2021-06-05 05:00:40,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:41,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:00:41,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:41,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:00:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:41,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:41,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:00:41,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:00:41,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:41,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:41,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:41,296 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,519 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 05:00:41,519 INFO L628 ElimStorePlain]: treesize reduction 315, result has 47.2 percent of original size [2021-06-05 05:00:41,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:41,524 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:00:41,528 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:41,532 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:41,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:41,637 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:41,641 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:41,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:00:41,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:41,793 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 05:00:41,793 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 05:00:41,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:00:41,799 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:751, output treesize:183 [2021-06-05 05:00:42,098 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 05:00:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:42,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102619936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:42,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:42,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:00:42,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432071149] [2021-06-05 05:00:42,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:42,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:42,679 INFO L87 Difference]: Start difference. First operand 390 states and 1159 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:43,236 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 118 [2021-06-05 05:00:43,812 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 129 [2021-06-05 05:00:44,011 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-06-05 05:00:44,300 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2021-06-05 05:00:44,864 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 142 [2021-06-05 05:00:45,117 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2021-06-05 05:00:45,833 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 156 [2021-06-05 05:00:46,125 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 113 [2021-06-05 05:00:46,460 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2021-06-05 05:00:46,663 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 05:00:47,382 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 165 [2021-06-05 05:00:47,985 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 143 [2021-06-05 05:00:48,353 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 103 [2021-06-05 05:00:49,595 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 226 DAG size of output: 174 [2021-06-05 05:00:50,224 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2021-06-05 05:00:51,109 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 188 [2021-06-05 05:00:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:51,120 INFO L93 Difference]: Finished difference Result 716 states and 2078 transitions. [2021-06-05 05:00:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:00:51,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:51,121 INFO L225 Difference]: With dead ends: 716 [2021-06-05 05:00:51,121 INFO L226 Difference]: Without dead ends: 701 [2021-06-05 05:00:51,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 8787.9ms TimeCoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:00:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-05 05:00:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 394. [2021-06-05 05:00:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.989821882951654) internal successors, (1175), 393 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1175 transitions. [2021-06-05 05:00:51,126 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1175 transitions. Word has length 20 [2021-06-05 05:00:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:51,126 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1175 transitions. [2021-06-05 05:00:51,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1175 transitions. [2021-06-05 05:00:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:51,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:51,127 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:51,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4337,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:51,327 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1859986214, now seen corresponding path program 37 times [2021-06-05 05:00:51,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:51,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226191002] [2021-06-05 05:00:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:51,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:51,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226191002] [2021-06-05 05:00:51,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226191002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:51,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850864198] [2021-06-05 05:00:51,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:00:51,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:51,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:51,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:51,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:51,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:51,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:51,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,789 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,793 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,797 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,801 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,805 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:51,809 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,813 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:51,817 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:51,821 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:51,825 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:51,840 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,845 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,849 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,852 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:51,856 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,860 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:51,864 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:51,868 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:00:51,872 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:51,876 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:51,879 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,883 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:00:51,887 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:51,890 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,894 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:51,898 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:51,901 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:51,905 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:51,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:51,909 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:52,031 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 05:00:52,031 INFO L628 ElimStorePlain]: treesize reduction 258, result has 36.6 percent of original size [2021-06-05 05:00:52,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:00:52,033 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:00:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:52,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850864198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:52,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:52,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:00:52,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343724323] [2021-06-05 05:00:52,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:52,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:52,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:52,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:52,563 INFO L87 Difference]: Start difference. First operand 394 states and 1175 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:52,988 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 05:00:53,334 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-06-05 05:00:53,719 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 77 [2021-06-05 05:00:54,255 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 91 [2021-06-05 05:00:55,100 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 101 [2021-06-05 05:00:56,021 WARN L205 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 104 [2021-06-05 05:00:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:56,043 INFO L93 Difference]: Finished difference Result 635 states and 1768 transitions. [2021-06-05 05:00:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:00:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:00:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:56,044 INFO L225 Difference]: With dead ends: 635 [2021-06-05 05:00:56,044 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 05:00:56,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3885.8ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:00:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 05:00:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 394. [2021-06-05 05:00:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.989821882951654) internal successors, (1175), 393 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1175 transitions. [2021-06-05 05:00:56,050 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1175 transitions. Word has length 20 [2021-06-05 05:00:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:56,051 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1175 transitions. [2021-06-05 05:00:56,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:56,051 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1175 transitions. [2021-06-05 05:00:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:00:56,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:56,051 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:56,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4440 [2021-06-05 05:00:56,252 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:56,252 INFO L82 PathProgramCache]: Analyzing trace with hash 246419480, now seen corresponding path program 38 times [2021-06-05 05:00:56,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:56,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274447692] [2021-06-05 05:00:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:56,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:56,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274447692] [2021-06-05 05:00:56,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274447692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:56,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467740337] [2021-06-05 05:00:56,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:56,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:56,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:00:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:56,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:56,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,795 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:56,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,805 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:56,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:56,814 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,819 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:56,823 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,828 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:56,832 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:56,836 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:00:56,841 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:56,845 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,850 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:56,854 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,859 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:00:56,863 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:00:56,867 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:56,872 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,876 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:56,880 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:56,884 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:00:56,888 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,892 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:00:56,897 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,900 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,904 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,908 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,912 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:00:56,916 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:00:56,920 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:00:56,924 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:00:56,928 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:57,107 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 05:00:57,108 INFO L628 ElimStorePlain]: treesize reduction 324, result has 38.5 percent of original size [2021-06-05 05:00:57,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:00:57,110 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1765, output treesize:203 [2021-06-05 05:00:57,668 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-06-05 05:00:57,831 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 05:00:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:57,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467740337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:57,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:57,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:00:57,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131679233] [2021-06-05 05:00:57,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:57,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:57,944 INFO L87 Difference]: Start difference. First operand 394 states and 1175 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:58,185 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 05:00:58,598 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 05:00:59,014 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-05 05:00:59,544 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-06-05 05:01:00,117 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2021-06-05 05:01:00,774 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2021-06-05 05:01:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:00,788 INFO L93 Difference]: Finished difference Result 604 states and 1705 transitions. [2021-06-05 05:01:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:01:00,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:00,789 INFO L225 Difference]: With dead ends: 604 [2021-06-05 05:01:00,789 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 05:01:00,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3733.4ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:01:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 05:01:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 394. [2021-06-05 05:01:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.989821882951654) internal successors, (1175), 393 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1175 transitions. [2021-06-05 05:01:00,793 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1175 transitions. Word has length 20 [2021-06-05 05:01:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:00,793 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1175 transitions. [2021-06-05 05:01:00,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1175 transitions. [2021-06-05 05:01:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:00,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:00,794 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:00,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4464 [2021-06-05 05:01:00,994 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash -492920346, now seen corresponding path program 39 times [2021-06-05 05:01:00,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:00,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055104145] [2021-06-05 05:01:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:01,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055104145] [2021-06-05 05:01:01,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055104145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156180656] [2021-06-05 05:01:01,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:01,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:01:01,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:01:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:01,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:01,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:01,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:01,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:01,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:01:01,730 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,957 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 05:01:01,957 INFO L628 ElimStorePlain]: treesize reduction 321, result has 46.8 percent of original size [2021-06-05 05:01:01,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:01,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:01,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:01,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:01,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:01,970 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:02,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:02,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:02,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:02,070 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:02,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:02,076 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:02,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:02,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:02,080 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:02,235 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 05:01:02,235 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 05:01:02,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:01:02,242 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:751, output treesize:183 [2021-06-05 05:01:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:02,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156180656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:02,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:02,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:01:02,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521376941] [2021-06-05 05:01:02,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:02,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:02,989 INFO L87 Difference]: Start difference. First operand 394 states and 1175 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:03,537 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 112 [2021-06-05 05:01:03,950 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 116 [2021-06-05 05:01:04,370 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 135 [2021-06-05 05:01:04,941 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 146 [2021-06-05 05:01:05,824 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 156 [2021-06-05 05:01:06,738 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 164 [2021-06-05 05:01:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:06,770 INFO L93 Difference]: Finished difference Result 678 states and 1882 transitions. [2021-06-05 05:01:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:01:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:06,771 INFO L225 Difference]: With dead ends: 678 [2021-06-05 05:01:06,771 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 05:01:06,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4298.9ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 05:01:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 398. [2021-06-05 05:01:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.005037783375315) internal successors, (1193), 397 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1193 transitions. [2021-06-05 05:01:06,776 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1193 transitions. Word has length 20 [2021-06-05 05:01:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:06,776 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1193 transitions. [2021-06-05 05:01:06,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1193 transitions. [2021-06-05 05:01:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:06,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:06,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:06,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4492,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:06,977 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1711555706, now seen corresponding path program 40 times [2021-06-05 05:01:06,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:06,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38227177] [2021-06-05 05:01:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:07,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:07,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38227177] [2021-06-05 05:01:07,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38227177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:07,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107885534] [2021-06-05 05:01:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:07,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:07,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:07,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:01:07,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:07,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:07,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:07,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:07,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:07,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:07,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:07,947 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-06-05 05:01:07,948 INFO L628 ElimStorePlain]: treesize reduction 106, result has 72.8 percent of original size [2021-06-05 05:01:07,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:07,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:07,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:07,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:07,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:08,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:08,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:08,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:08,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:08,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:08,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:08,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:08,159 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:08,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:08,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:08,258 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:08,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:08,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:08,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:08,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:08,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:08,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:08,346 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:08,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:08,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:01:08,438 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:01:08,601 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:01:09,085 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 05:01:09,262 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-05 05:01:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:09,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107885534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:09,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:09,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:01:09,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247560012] [2021-06-05 05:01:09,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:09,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:09,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:09,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:09,437 INFO L87 Difference]: Start difference. First operand 398 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:10,033 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 127 [2021-06-05 05:01:10,764 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 129 [2021-06-05 05:01:10,942 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 05:01:11,576 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 139 [2021-06-05 05:01:12,374 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 147 [2021-06-05 05:01:13,236 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 153 [2021-06-05 05:01:14,186 WARN L205 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 164 [2021-06-05 05:01:15,053 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 157 [2021-06-05 05:01:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:15,065 INFO L93 Difference]: Finished difference Result 702 states and 1979 transitions. [2021-06-05 05:01:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:01:15,065 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:15,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:15,066 INFO L225 Difference]: With dead ends: 702 [2021-06-05 05:01:15,066 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 05:01:15,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 6256.0ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:01:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 05:01:15,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 398. [2021-06-05 05:01:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.005037783375315) internal successors, (1193), 397 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1193 transitions. [2021-06-05 05:01:15,071 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1193 transitions. Word has length 20 [2021-06-05 05:01:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:15,071 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1193 transitions. [2021-06-05 05:01:15,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1193 transitions. [2021-06-05 05:01:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:15,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:15,072 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:15,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:15,272 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 496140202, now seen corresponding path program 41 times [2021-06-05 05:01:15,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:15,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945926176] [2021-06-05 05:01:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:15,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:15,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945926176] [2021-06-05 05:01:15,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945926176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:15,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38708623] [2021-06-05 05:01:15,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:15,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:01:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:15,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:01:15,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:15,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:15,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:01:15,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:15,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:01:15,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,704 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,708 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,712 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:01:15,716 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,721 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:01:15,725 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:01:15,729 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:15,733 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:01:15,737 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,741 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:01:15,745 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,749 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,753 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:01:15,757 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,761 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,765 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,769 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:01:15,773 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:01:15,793 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,798 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:01:15,802 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:01:15,805 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:15,809 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,813 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:01:15,817 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:01:15,820 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:01:15,824 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:01:15,828 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:15,948 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 05:01:15,949 INFO L628 ElimStorePlain]: treesize reduction 248, result has 37.5 percent of original size [2021-06-05 05:01:15,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:01:15,950 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:01:16,398 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 05:01:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:16,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38708623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:16,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:16,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:01:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335573437] [2021-06-05 05:01:16,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:16,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:16,585 INFO L87 Difference]: Start difference. First operand 398 states and 1193 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:16,806 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 05:01:17,210 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 05:01:17,851 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 05:01:18,010 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 05:01:18,365 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-06-05 05:01:18,610 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 05:01:18,969 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 90 [2021-06-05 05:01:19,227 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 05:01:19,963 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 96 [2021-06-05 05:01:20,214 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-06-05 05:01:20,473 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-06-05 05:01:20,755 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 05:01:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:20,756 INFO L93 Difference]: Finished difference Result 952 states and 2582 transitions. [2021-06-05 05:01:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:01:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:20,757 INFO L225 Difference]: With dead ends: 952 [2021-06-05 05:01:20,757 INFO L226 Difference]: Without dead ends: 916 [2021-06-05 05:01:20,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 4621.0ms TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:01:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-05 05:01:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 405. [2021-06-05 05:01:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.032178217821782) internal successors, (1225), 404 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1225 transitions. [2021-06-05 05:01:20,763 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1225 transitions. Word has length 20 [2021-06-05 05:01:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:20,763 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1225 transitions. [2021-06-05 05:01:20,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1225 transitions. [2021-06-05 05:01:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:20,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:20,764 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:20,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4668 [2021-06-05 05:01:20,964 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash -674048794, now seen corresponding path program 42 times [2021-06-05 05:01:20,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:20,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697580156] [2021-06-05 05:01:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:21,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:21,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697580156] [2021-06-05 05:01:21,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697580156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:21,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370807237] [2021-06-05 05:01:21,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:21,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:01:21,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:01:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:21,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:21,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:21,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:21,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:21,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:21,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:21,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:21,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:21,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:01:21,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:22,224 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2021-06-05 05:01:22,224 INFO L628 ElimStorePlain]: treesize reduction 391, result has 49.8 percent of original size [2021-06-05 05:01:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:22,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:22,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:22,236 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:22,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:22,241 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:22,501 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 05:01:22,502 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:01:22,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:22,507 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:22,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:22,512 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:22,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:22,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:22,516 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:22,639 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 05:01:22,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:22,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:01:22,646 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:295 [2021-06-05 05:01:22,858 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2021-06-05 05:01:23,043 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 05:01:23,282 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_841, v_prenex_831, v_prenex_821, v_prenex_843, v_prenex_833, v_prenex_823, v_prenex_835, v_prenex_846, v_prenex_825, v_prenex_837, v_prenex_827, v_prenex_839, v_prenex_829], 1=[get_3, v_prenex_840, v_prenex_830, v_prenex_820, v_prenex_842, v_prenex_832, v_prenex_822, v_prenex_834, v_prenex_845, v_prenex_824, v_prenex_836, v_prenex_826, v_prenex_838, v_prenex_828]} [2021-06-05 05:01:23,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:23,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:23,853 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 114 [2021-06-05 05:01:23,854 INFO L628 ElimStorePlain]: treesize reduction 1223, result has 24.4 percent of original size [2021-06-05 05:01:23,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:01:23,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:24,027 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 05:01:24,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:24,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_831 vanished before elimination [2021-06-05 05:01:24,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_821 vanished before elimination [2021-06-05 05:01:24,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:24,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:24,201 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 05:01:24,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:24,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:01:24,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:24,368 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 05:01:24,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:24,368 INFO L518 ElimStorePlain]: Eliminatee v_prenex_823 vanished before elimination [2021-06-05 05:01:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:24,374 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:24,531 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 05:01:24,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:24,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:24,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:24,711 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:01:24,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:24,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_825 vanished before elimination [2021-06-05 05:01:24,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:24,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:24,884 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:01:24,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:24,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_827 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_839 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_829 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_840 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_830 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_820 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_842 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_832 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_822 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_834 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_845 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_824 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_836 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_826 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_838 vanished before elimination [2021-06-05 05:01:24,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_828 vanished before elimination [2021-06-05 05:01:24,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 28 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:01:24,890 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 42 variables, input treesize:1625, output treesize:328 [2021-06-05 05:01:25,198 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 05:01:25,622 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 05:01:25,862 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 05:01:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:25,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370807237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:25,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:25,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:01:25,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029662496] [2021-06-05 05:01:25,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:25,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:25,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:25,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:25,994 INFO L87 Difference]: Start difference. First operand 405 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:26,353 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2021-06-05 05:01:26,755 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2021-06-05 05:01:27,355 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 139 [2021-06-05 05:01:28,153 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 151 [2021-06-05 05:01:29,189 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 155 [2021-06-05 05:01:30,320 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 196 DAG size of output: 162 [2021-06-05 05:01:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:30,352 INFO L93 Difference]: Finished difference Result 700 states and 1958 transitions. [2021-06-05 05:01:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:01:30,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:30,354 INFO L225 Difference]: With dead ends: 700 [2021-06-05 05:01:30,354 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 05:01:30,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5672.1ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:01:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 05:01:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 402. [2021-06-05 05:01:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.027431421446384) internal successors, (1214), 401 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1214 transitions. [2021-06-05 05:01:30,359 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1214 transitions. Word has length 20 [2021-06-05 05:01:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:30,359 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1214 transitions. [2021-06-05 05:01:30,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1214 transitions. [2021-06-05 05:01:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:30,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:30,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:30,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4695 [2021-06-05 05:01:30,560 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash -690985846, now seen corresponding path program 43 times [2021-06-05 05:01:30,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:30,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197760654] [2021-06-05 05:01:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:30,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:30,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197760654] [2021-06-05 05:01:30,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197760654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:30,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503746315] [2021-06-05 05:01:30,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:01:31,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:31,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:31,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:31,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:31,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:31,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:31,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:01:31,285 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,546 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 05:01:31,546 INFO L628 ElimStorePlain]: treesize reduction 354, result has 45.5 percent of original size [2021-06-05 05:01:31,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:31,551 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:31,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:31,560 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,748 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 05:01:31,748 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:01:31,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:31,753 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:31,768 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:31,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:31,773 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:31,921 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 05:01:31,921 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 05:01:31,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:01:31,927 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:751, output treesize:183 [2021-06-05 05:01:32,577 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-05 05:01:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:32,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503746315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:32,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:32,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:01:32,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199535690] [2021-06-05 05:01:32,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:32,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:32,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:32,765 INFO L87 Difference]: Start difference. First operand 402 states and 1214 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:33,468 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 05:01:33,644 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2021-06-05 05:01:33,952 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2021-06-05 05:01:34,131 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 05:01:34,691 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 122 [2021-06-05 05:01:34,948 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 05:01:35,556 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2021-06-05 05:01:35,830 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-05 05:01:36,497 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 136 [2021-06-05 05:01:36,799 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-05 05:01:37,103 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-05 05:01:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:37,104 INFO L93 Difference]: Finished difference Result 957 states and 2592 transitions. [2021-06-05 05:01:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:01:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:37,105 INFO L225 Difference]: With dead ends: 957 [2021-06-05 05:01:37,105 INFO L226 Difference]: Without dead ends: 919 [2021-06-05 05:01:37,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4889.6ms TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:01:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-06-05 05:01:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 404. [2021-06-05 05:01:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.029776674937965) internal successors, (1221), 403 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1221 transitions. [2021-06-05 05:01:37,111 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1221 transitions. Word has length 20 [2021-06-05 05:01:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:37,111 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1221 transitions. [2021-06-05 05:01:37,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1221 transitions. [2021-06-05 05:01:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:37,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:37,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:37,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4837 [2021-06-05 05:01:37,312 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:37,313 INFO L82 PathProgramCache]: Analyzing trace with hash 449297990, now seen corresponding path program 44 times [2021-06-05 05:01:37,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:37,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544379964] [2021-06-05 05:01:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:37,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544379964] [2021-06-05 05:01:37,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544379964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757473171] [2021-06-05 05:01:37,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:37,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:01:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:38,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:38,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:38,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,305 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-06-05 05:01:38,305 INFO L628 ElimStorePlain]: treesize reduction 104, result has 73.1 percent of original size [2021-06-05 05:01:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:38,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:38,316 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,419 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:01:38,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:38,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:38,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:38,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,627 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 05:01:38,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:38,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:38,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:38,639 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:38,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:38,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:38,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:38,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:38,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:01:38,803 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:01:38,958 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:01:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:39,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757473171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:39,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:39,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:01:39,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343224099] [2021-06-05 05:01:39,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:39,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:39,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:39,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:39,673 INFO L87 Difference]: Start difference. First operand 404 states and 1221 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:40,205 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 114 [2021-06-05 05:01:40,625 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 118 [2021-06-05 05:01:41,010 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 129 [2021-06-05 05:01:41,696 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 135 [2021-06-05 05:01:42,433 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 145 [2021-06-05 05:01:43,246 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 152 [2021-06-05 05:01:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:43,278 INFO L93 Difference]: Finished difference Result 705 states and 1969 transitions. [2021-06-05 05:01:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:01:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:43,279 INFO L225 Difference]: With dead ends: 705 [2021-06-05 05:01:43,279 INFO L226 Difference]: Without dead ends: 690 [2021-06-05 05:01:43,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 4228.7ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-05 05:01:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 406. [2021-06-05 05:01:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.0320987654320986) internal successors, (1228), 405 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1228 transitions. [2021-06-05 05:01:43,284 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1228 transitions. Word has length 20 [2021-06-05 05:01:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:43,284 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1228 transitions. [2021-06-05 05:01:43,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1228 transitions. [2021-06-05 05:01:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:43,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:43,284 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:43,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4942,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:43,485 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash 341702684, now seen corresponding path program 45 times [2021-06-05 05:01:43,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:43,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079870127] [2021-06-05 05:01:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:44,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079870127] [2021-06-05 05:01:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079870127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955462806] [2021-06-05 05:01:44,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:44,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:01:44,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:01:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:44,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:44,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:44,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:44,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:44,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:44,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:44,889 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 110 [2021-06-05 05:01:44,889 INFO L628 ElimStorePlain]: treesize reduction 128, result has 74.9 percent of original size [2021-06-05 05:01:44,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:44,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:44,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:44,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:44,903 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:45,044 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 05:01:45,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:45,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:45,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:45,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:45,197 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 05:01:45,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:45,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:45,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:45,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:45,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:45,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:45,209 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:45,342 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:01:45,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:45,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:45,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:45,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:45,479 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:01:45,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:45,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:45,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:45,485 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:45,613 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:01:45,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:45,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:01:45,621 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:597, output treesize:298 [2021-06-05 05:01:45,834 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2021-06-05 05:01:46,014 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 05:01:46,621 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 139 [2021-06-05 05:01:46,948 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_930, v_prenex_920, v_prenex_932, v_prenex_910, v_prenex_922, v_prenex_934, v_prenex_912, v_prenex_924, v_prenex_946, v_prenex_902, v_prenex_914, v_prenex_936, v_prenex_904, v_prenex_926, v_prenex_916, v_prenex_906, v_prenex_928, v_prenex_918, v_prenex_908], 1=[get_3, v_prenex_931, v_prenex_921, v_prenex_933, v_prenex_911, v_prenex_923, v_prenex_945, v_prenex_901, v_prenex_913, v_prenex_935, v_prenex_903, v_prenex_925, v_prenex_915, v_prenex_905, v_prenex_927, v_prenex_917, v_prenex_929, v_prenex_907, v_prenex_919, v_prenex_909]} [2021-06-05 05:01:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:01:46,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:46,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:47,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:47,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:47,735 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 145 [2021-06-05 05:01:47,735 INFO L628 ElimStorePlain]: treesize reduction 1599, result has 23.3 percent of original size [2021-06-05 05:01:47,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_930 vanished before elimination [2021-06-05 05:01:47,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_920 vanished before elimination [2021-06-05 05:01:47,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_932 vanished before elimination [2021-06-05 05:01:47,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:47,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:47,938 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 05:01:47,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:47,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:47,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:48,143 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 05:01:48,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:48,143 INFO L518 ElimStorePlain]: Eliminatee v_prenex_934 vanished before elimination [2021-06-05 05:01:48,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:01:48,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:48,345 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 05:01:48,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:48,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_924 vanished before elimination [2021-06-05 05:01:48,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_946 vanished before elimination [2021-06-05 05:01:48,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:01:48,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:48,573 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 05:01:48,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:48,581 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:48,766 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 05:01:48,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:48,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_936 vanished before elimination [2021-06-05 05:01:48,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_904 vanished before elimination [2021-06-05 05:01:48,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_926 vanished before elimination [2021-06-05 05:01:48,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:48,774 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:48,965 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 05:01:48,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:48,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-06-05 05:01:48,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:01:48,972 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:49,152 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 05:01:49,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:49,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:01:49,159 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:49,336 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 05:01:49,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:49,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:01:49,342 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:49,520 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:01:49,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:49,520 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_931 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_921 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_933 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_911 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_923 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_945 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_901 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_913 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_935 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_903 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_925 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_915 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_905 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_927 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_917 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_929 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_907 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_919 vanished before elimination [2021-06-05 05:01:49,521 INFO L518 ElimStorePlain]: Eliminatee v_prenex_909 vanished before elimination [2021-06-05 05:01:49,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 40 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-05 05:01:49,527 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 60 variables, input treesize:2201, output treesize:346 [2021-06-05 05:01:49,829 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 05:01:50,074 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 05:01:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:50,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955462806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:50,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:50,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:01:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873309758] [2021-06-05 05:01:50,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:50,228 INFO L87 Difference]: Start difference. First operand 406 states and 1228 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:50,734 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 135 [2021-06-05 05:01:51,361 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 139 [2021-06-05 05:01:52,497 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 283 DAG size of output: 226 [2021-06-05 05:01:53,402 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 162 [2021-06-05 05:01:53,688 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 59 [2021-06-05 05:01:54,709 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 177 [2021-06-05 05:01:54,935 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 05:01:55,124 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 57 [2021-06-05 05:01:55,573 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 120 [2021-06-05 05:01:56,695 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 242 DAG size of output: 186 [2021-06-05 05:01:57,017 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2021-06-05 05:01:57,379 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 102 [2021-06-05 05:01:57,526 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 05:01:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:57,580 INFO L93 Difference]: Finished difference Result 826 states and 2253 transitions. [2021-06-05 05:01:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:01:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:01:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:57,581 INFO L225 Difference]: With dead ends: 826 [2021-06-05 05:01:57,581 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 05:01:57,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 8672.9ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:01:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 05:01:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 421. [2021-06-05 05:01:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0476190476190474) internal successors, (1280), 420 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1280 transitions. [2021-06-05 05:01:57,586 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1280 transitions. Word has length 20 [2021-06-05 05:01:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:57,586 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1280 transitions. [2021-06-05 05:01:57,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1280 transitions. [2021-06-05 05:01:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:01:57,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:57,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:57,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5038,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:57,793 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash -828486312, now seen corresponding path program 46 times [2021-06-05 05:01:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:57,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040389536] [2021-06-05 05:01:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:58,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:58,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040389536] [2021-06-05 05:01:58,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040389536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:58,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364808830] [2021-06-05 05:01:58,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:58,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:58,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:01:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:58,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:58,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:58,868 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-06-05 05:01:58,868 INFO L628 ElimStorePlain]: treesize reduction 164, result has 66.8 percent of original size [2021-06-05 05:01:58,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:58,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:58,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:58,994 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 05:01:58,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:59,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:59,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:59,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:59,122 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:01:59,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:01:59,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:59,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:59,236 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 05:01:59,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:59,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:01:59,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:59,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:59,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:59,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:59,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:59,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:01:59,347 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:59,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:01:59,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:01:59,448 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:501, output treesize:220 [2021-06-05 05:01:59,623 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-06-05 05:02:00,026 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-05 05:02:00,739 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_966, v_prenex_968, get_6, v_prenex_970, v_prenex_972, v_prenex_974, v_prenex_964], 1=[v_prenex_965, get_3, v_prenex_967, v_prenex_969, v_prenex_971, v_prenex_973, v_prenex_963]} [2021-06-05 05:02:00,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:02:00,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:00,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:02:00,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:00,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:02:00,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 05:02:00,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:00,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:02:00,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:00,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:00,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:01,352 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 102 [2021-06-05 05:02:01,352 INFO L628 ElimStorePlain]: treesize reduction 1760, result has 16.8 percent of original size [2021-06-05 05:02:01,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:02:01,358 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:01,498 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 05:02:01,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:01,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:01,651 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 05:02:01,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:01,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:01,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:01,787 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:02:01,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:01,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:01,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:01,919 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 05:02:01,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:01,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:01,924 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:02,048 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 05:02:02,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:02,053 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:02,214 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 05:02:02,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:02,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_965 vanished before elimination [2021-06-05 05:02:02,215 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:02:02,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_967 vanished before elimination [2021-06-05 05:02:02,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_969 vanished before elimination [2021-06-05 05:02:02,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_971 vanished before elimination [2021-06-05 05:02:02,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_973 vanished before elimination [2021-06-05 05:02:02,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_963 vanished before elimination [2021-06-05 05:02:02,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:02:02,218 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2293, output treesize:253 [2021-06-05 05:02:02,553 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 05:02:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:02,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364808830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:02,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:02,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:02:02,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783799597] [2021-06-05 05:02:02,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:02,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:02,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:02,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:02,687 INFO L87 Difference]: Start difference. First operand 421 states and 1280 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:03,345 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 117 [2021-06-05 05:02:03,942 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 121 [2021-06-05 05:02:04,790 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 141 [2021-06-05 05:02:05,480 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 141 [2021-06-05 05:02:06,315 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 151 [2021-06-05 05:02:07,242 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 164 [2021-06-05 05:02:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:07,280 INFO L93 Difference]: Finished difference Result 671 states and 1895 transitions. [2021-06-05 05:02:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:02:07,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:07,281 INFO L225 Difference]: With dead ends: 671 [2021-06-05 05:02:07,281 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 05:02:07,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5533.4ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 05:02:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 418. [2021-06-05 05:02:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0431654676258995) internal successors, (1269), 417 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1269 transitions. [2021-06-05 05:02:07,287 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1269 transitions. Word has length 20 [2021-06-05 05:02:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:07,287 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1269 transitions. [2021-06-05 05:02:07,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1269 transitions. [2021-06-05 05:02:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:07,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:07,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:07,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5149,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:07,488 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash -574161018, now seen corresponding path program 47 times [2021-06-05 05:02:07,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:07,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374810762] [2021-06-05 05:02:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:07,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:07,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374810762] [2021-06-05 05:02:07,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374810762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:07,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149868328] [2021-06-05 05:02:07,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:07,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:07,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:02:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:08,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:08,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:08,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:08,050 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:08,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:08,058 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,062 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,066 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,070 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,074 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:08,078 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,082 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:08,086 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:08,091 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:08,095 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:08,099 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,103 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:08,107 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,111 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,115 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:08,119 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,123 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,127 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,131 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:08,138 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:02:08,142 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,146 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:02:08,150 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:02:08,156 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:08,159 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,163 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:08,167 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:08,171 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:02:08,174 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:08,178 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:08,297 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 05:02:08,297 INFO L628 ElimStorePlain]: treesize reduction 248, result has 37.5 percent of original size [2021-06-05 05:02:08,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:02:08,299 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:02:08,627 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 05:02:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149868328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:08,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:08,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:02:08,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63585878] [2021-06-05 05:02:08,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:02:08,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:02:08,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:02:08,899 INFO L87 Difference]: Start difference. First operand 418 states and 1269 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:09,314 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 05:02:09,601 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-06-05 05:02:09,958 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 84 [2021-06-05 05:02:10,498 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2021-06-05 05:02:10,790 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 91 [2021-06-05 05:02:11,132 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2021-06-05 05:02:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:11,155 INFO L93 Difference]: Finished difference Result 644 states and 1836 transitions. [2021-06-05 05:02:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:02:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:11,156 INFO L225 Difference]: With dead ends: 644 [2021-06-05 05:02:11,156 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 05:02:11,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2872.0ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:02:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 05:02:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 418. [2021-06-05 05:02:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0431654676258995) internal successors, (1269), 417 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1269 transitions. [2021-06-05 05:02:11,161 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1269 transitions. Word has length 20 [2021-06-05 05:02:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:11,161 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1269 transitions. [2021-06-05 05:02:11,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1269 transitions. [2021-06-05 05:02:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:11,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:11,161 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:11,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5386 [2021-06-05 05:02:11,362 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash 637711574, now seen corresponding path program 48 times [2021-06-05 05:02:11,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:11,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773963216] [2021-06-05 05:02:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:11,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773963216] [2021-06-05 05:02:11,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773963216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235567230] [2021-06-05 05:02:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:11,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:02:11,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:02:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:12,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-06-05 05:02:12,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 05:02:12,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 32 [2021-06-05 05:02:12,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 05:02:12,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 05:02:12,218 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 05:02:12,223 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,469 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 05:02:12,470 INFO L628 ElimStorePlain]: treesize reduction 347, result has 48.7 percent of original size [2021-06-05 05:02:12,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-06-05 05:02:12,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 05:02:12,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 05:02:12,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,675 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 05:02:12,675 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:02:12,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-06-05 05:02:12,680 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 05:02:12,685 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:12,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 05:02:12,689 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:12,796 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 05:02:12,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:12,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:02:12,802 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:901, output treesize:245 [2021-06-05 05:02:13,594 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 129 [2021-06-05 05:02:14,775 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 05:02:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:14,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235567230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:14,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:14,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:02:14,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429447763] [2021-06-05 05:02:14,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:14,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:14,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:14,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:14,875 INFO L87 Difference]: Start difference. First operand 418 states and 1269 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:15,480 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-06-05 05:02:15,955 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 124 [2021-06-05 05:02:16,894 WARN L205 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 157 [2021-06-05 05:02:17,467 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 151 [2021-06-05 05:02:18,856 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 207 DAG size of output: 157 [2021-06-05 05:02:19,899 WARN L205 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 169 [2021-06-05 05:02:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:19,917 INFO L93 Difference]: Finished difference Result 667 states and 1883 transitions. [2021-06-05 05:02:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:02:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:19,918 INFO L225 Difference]: With dead ends: 667 [2021-06-05 05:02:19,918 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 05:02:19,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5910.9ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 05:02:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 422. [2021-06-05 05:02:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0522565320665085) internal successors, (1285), 421 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1285 transitions. [2021-06-05 05:02:19,923 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1285 transitions. Word has length 20 [2021-06-05 05:02:19,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:19,923 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1285 transitions. [2021-06-05 05:02:19,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1285 transitions. [2021-06-05 05:02:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:19,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:19,924 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:20,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5411,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:20,124 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1777995410, now seen corresponding path program 49 times [2021-06-05 05:02:20,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:20,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895320103] [2021-06-05 05:02:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:20,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:20,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895320103] [2021-06-05 05:02:20,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895320103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:20,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976456870] [2021-06-05 05:02:20,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:02:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:20,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:20,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:20,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:20,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:20,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:20,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:20,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:20,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:20,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:20,770 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:20,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:20,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:20,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:21,032 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 05:02:21,033 INFO L628 ElimStorePlain]: treesize reduction 340, result has 47.6 percent of original size [2021-06-05 05:02:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:21,037 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:21,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:21,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:21,046 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:21,157 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 05:02:21,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:21,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:21,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:21,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:21,170 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:21,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:21,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:21,174 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:21,374 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 05:02:21,374 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:02:21,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:02:21,380 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:805, output treesize:210 [2021-06-05 05:02:21,888 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-06-05 05:02:22,530 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_1010, v_prenex_1012, v_prenex_1014, v_prenex_1016, v_prenex_1008, v_prenex_1018], 1=[get_3, v_prenex_1009, v_prenex_1011, v_prenex_1013, v_prenex_1015, v_prenex_1017, v_prenex_1007]} [2021-06-05 05:02:22,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:22,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:22,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:22,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:22,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:22,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:22,586 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:23,107 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 101 [2021-06-05 05:02:23,108 INFO L628 ElimStorePlain]: treesize reduction 1726, result has 16.8 percent of original size [2021-06-05 05:02:23,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:02:23,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:23,251 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 05:02:23,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:23,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:23,258 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:23,391 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:02:23,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:23,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:23,397 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:23,532 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 05:02:23,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:23,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:02:23,537 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:23,664 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 05:02:23,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:23,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:23,670 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:23,795 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 05:02:23,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:23,800 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:23,920 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 05:02:23,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:23,920 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:02:23,920 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1009 vanished before elimination [2021-06-05 05:02:23,920 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1011 vanished before elimination [2021-06-05 05:02:23,920 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1013 vanished before elimination [2021-06-05 05:02:23,920 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1015 vanished before elimination [2021-06-05 05:02:23,920 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1017 vanished before elimination [2021-06-05 05:02:23,920 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1007 vanished before elimination [2021-06-05 05:02:23,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:02:23,924 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2245, output treesize:253 [2021-06-05 05:02:24,244 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 05:02:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:24,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976456870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:24,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:24,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:02:24,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863637353] [2021-06-05 05:02:24,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:24,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:24,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:24,382 INFO L87 Difference]: Start difference. First operand 422 states and 1285 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:24,972 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 119 [2021-06-05 05:02:25,426 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 123 [2021-06-05 05:02:25,982 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 131 [2021-06-05 05:02:26,467 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 137 [2021-06-05 05:02:27,309 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 153 [2021-06-05 05:02:27,947 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 164 [2021-06-05 05:02:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:27,977 INFO L93 Difference]: Finished difference Result 674 states and 1901 transitions. [2021-06-05 05:02:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:02:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:27,978 INFO L225 Difference]: With dead ends: 674 [2021-06-05 05:02:27,978 INFO L226 Difference]: Without dead ends: 659 [2021-06-05 05:02:27,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4284.3ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-05 05:02:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 420. [2021-06-05 05:02:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.045346062052506) internal successors, (1276), 419 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1276 transitions. [2021-06-05 05:02:27,983 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1276 transitions. Word has length 20 [2021-06-05 05:02:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:27,983 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1276 transitions. [2021-06-05 05:02:27,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1276 transitions. [2021-06-05 05:02:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:27,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:27,983 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:28,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5566,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:28,184 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -997933088, now seen corresponding path program 50 times [2021-06-05 05:02:28,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:28,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572926941] [2021-06-05 05:02:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:28,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572926941] [2021-06-05 05:02:28,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572926941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985501369] [2021-06-05 05:02:28,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:28,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:02:28,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:29,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:29,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:29,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:29,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:29,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:29,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:29,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,387 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 05:02:29,387 INFO L628 ElimStorePlain]: treesize reduction 396, result has 49.0 percent of original size [2021-06-05 05:02:29,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:29,393 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:29,398 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:29,403 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,669 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 05:02:29,670 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:02:29,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:29,675 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:29,680 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:29,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:29,684 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:29,806 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 05:02:29,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:29,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:02:29,813 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:303 [2021-06-05 05:02:30,032 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2021-06-05 05:02:30,205 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 05:02:30,501 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2021-06-05 05:02:31,016 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 119 [2021-06-05 05:02:31,281 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1051, v_prenex_1061, v_prenex_1053, v_prenex_1074, v_prenex_1041, v_prenex_1063, v_prenex_1055, get_6, v_prenex_1043, v_prenex_1065, v_prenex_1057, v_prenex_1067, v_prenex_1045, v_prenex_1059, v_prenex_1047, v_prenex_1049], 1=[v_prenex_1060, get_3, v_prenex_1073, v_prenex_1040, v_prenex_1062, v_prenex_1050, v_prenex_1042, v_prenex_1064, v_prenex_1052, v_prenex_1066, v_prenex_1044, v_prenex_1054, v_prenex_1046, v_prenex_1056, v_prenex_1048, v_prenex_1058]} [2021-06-05 05:02:31,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:31,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:31,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:31,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:31,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:31,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:31,872 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 124 [2021-06-05 05:02:31,873 INFO L628 ElimStorePlain]: treesize reduction 1295, result has 23.4 percent of original size [2021-06-05 05:02:31,873 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1061 vanished before elimination [2021-06-05 05:02:31,873 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1053 vanished before elimination [2021-06-05 05:02:31,873 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1074 vanished before elimination [2021-06-05 05:02:31,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:31,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:32,023 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 05:02:32,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:32,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1063 vanished before elimination [2021-06-05 05:02:32,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1055 vanished before elimination [2021-06-05 05:02:32,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:32,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:32,178 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 05:02:32,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:32,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:32,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:32,325 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 05:02:32,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:32,332 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:32,470 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 05:02:32,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:32,470 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1057 vanished before elimination [2021-06-05 05:02:32,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:32,476 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:32,612 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 05:02:32,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:32,613 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1045 vanished before elimination [2021-06-05 05:02:32,613 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1059 vanished before elimination [2021-06-05 05:02:32,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:32,619 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:32,751 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:02:32,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:32,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:32,756 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:32,884 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:02:32,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1060 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1073 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1040 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1062 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1050 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1042 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1064 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1052 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1066 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1044 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1054 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1046 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1056 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1048 vanished before elimination [2021-06-05 05:02:32,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1058 vanished before elimination [2021-06-05 05:02:32,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 32 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 05:02:32,889 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 48 variables, input treesize:1779, output treesize:276 [2021-06-05 05:02:33,096 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-06-05 05:02:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:33,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985501369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:33,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:33,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:02:33,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359284122] [2021-06-05 05:02:33,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:33,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:33,228 INFO L87 Difference]: Start difference. First operand 420 states and 1276 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:33,608 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 125 [2021-06-05 05:02:34,114 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2021-06-05 05:02:34,257 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 05:02:34,811 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-05 05:02:35,021 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-06-05 05:02:35,871 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 204 [2021-06-05 05:02:36,094 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-06-05 05:02:36,552 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 150 [2021-06-05 05:02:36,677 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 05:02:37,216 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2021-06-05 05:02:37,359 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 05:02:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:37,377 INFO L93 Difference]: Finished difference Result 784 states and 2208 transitions. [2021-06-05 05:02:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:37,378 INFO L225 Difference]: With dead ends: 784 [2021-06-05 05:02:37,378 INFO L226 Difference]: Without dead ends: 754 [2021-06-05 05:02:37,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 5278.6ms TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:02:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-06-05 05:02:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 422. [2021-06-05 05:02:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0475059382422804) internal successors, (1283), 421 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1283 transitions. [2021-06-05 05:02:37,383 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1283 transitions. Word has length 20 [2021-06-05 05:02:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:37,383 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1283 transitions. [2021-06-05 05:02:37,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1283 transitions. [2021-06-05 05:02:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:37,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:37,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:37,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5757 [2021-06-05 05:02:37,584 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash -426176046, now seen corresponding path program 51 times [2021-06-05 05:02:37,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:37,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358308008] [2021-06-05 05:02:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:38,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:38,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358308008] [2021-06-05 05:02:38,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358308008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:38,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176141314] [2021-06-05 05:02:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:38,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:02:38,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:38,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:02:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:38,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:38,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:38,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:38,708 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 107 [2021-06-05 05:02:38,709 INFO L628 ElimStorePlain]: treesize reduction 185, result has 68.0 percent of original size [2021-06-05 05:02:38,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:38,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:38,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:38,863 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 05:02:38,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:38,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:38,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:38,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:39,016 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 05:02:39,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:39,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:39,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:39,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:39,028 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:39,167 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 05:02:39,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:39,173 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:39,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:39,178 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:39,309 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:02:39,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:39,315 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:39,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:39,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:39,320 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:39,442 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 05:02:39,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:39,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:02:39,449 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:585, output treesize:279 [2021-06-05 05:02:39,672 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2021-06-05 05:02:40,267 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 107 [2021-06-05 05:02:41,084 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1109, get_6, v_prenex_1111, v_prenex_1103, v_prenex_1105, v_prenex_1107], 1=[v_prenex_1108, v_prenex_1110, v_prenex_1112, get_0, v_prenex_1104, v_prenex_1106]} [2021-06-05 05:02:41,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:41,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:41,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:41,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:41,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:41,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:02:41,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,538 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 94 [2021-06-05 05:02:41,538 INFO L628 ElimStorePlain]: treesize reduction 1509, result has 15.8 percent of original size [2021-06-05 05:02:41,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:41,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,645 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:02:41,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:41,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,758 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:02:41,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:41,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:02:41,763 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:41,865 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:41,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:02:41,962 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:42,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:42,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1108 vanished before elimination [2021-06-05 05:02:42,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1110 vanished before elimination [2021-06-05 05:02:42,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1112 vanished before elimination [2021-06-05 05:02:42,050 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:02:42,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1104 vanished before elimination [2021-06-05 05:02:42,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1106 vanished before elimination [2021-06-05 05:02:42,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 05:02:42,053 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1959, output treesize:187 [2021-06-05 05:02:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:42,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176141314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:42,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:42,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:02:42,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660732268] [2021-06-05 05:02:42,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:42,249 INFO L87 Difference]: Start difference. First operand 422 states and 1283 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:42,768 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 05:02:43,137 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-06-05 05:02:43,926 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 149 [2021-06-05 05:02:44,863 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 215 [2021-06-05 05:02:45,175 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-05 05:02:45,527 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2021-06-05 05:02:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:45,540 INFO L93 Difference]: Finished difference Result 579 states and 1701 transitions. [2021-06-05 05:02:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:02:45,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:45,541 INFO L225 Difference]: With dead ends: 579 [2021-06-05 05:02:45,541 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 05:02:45,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4216.6ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 05:02:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 426. [2021-06-05 05:02:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.051764705882353) internal successors, (1297), 425 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1297 transitions. [2021-06-05 05:02:45,545 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1297 transitions. Word has length 20 [2021-06-05 05:02:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:45,545 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1297 transitions. [2021-06-05 05:02:45,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1297 transitions. [2021-06-05 05:02:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:45,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:45,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:45,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5936 [2021-06-05 05:02:45,746 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:45,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:45,747 INFO L82 PathProgramCache]: Analyzing trace with hash -633183728, now seen corresponding path program 52 times [2021-06-05 05:02:45,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:45,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319679561] [2021-06-05 05:02:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:46,107 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 05:02:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:46,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:46,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319679561] [2021-06-05 05:02:46,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319679561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:46,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080348132] [2021-06-05 05:02:46,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:46,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:46,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:46,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:02:46,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:46,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:46,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:02:46,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:46,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:46,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:46,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:46,454 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:46,458 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:02:46,467 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:46,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:46,476 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,480 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:02:46,485 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:02:46,489 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,494 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:46,498 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,502 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,507 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,511 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:46,516 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,520 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:46,524 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,528 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:46,533 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:46,537 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,541 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,545 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:46,549 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,553 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,558 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:46,561 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:46,565 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,570 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:46,574 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:46,578 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:46,738 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 05:02:46,738 INFO L628 ElimStorePlain]: treesize reduction 303, result has 39.0 percent of original size [2021-06-05 05:02:46,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:02:46,740 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1729, output treesize:194 [2021-06-05 05:02:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:47,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080348132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:47,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:47,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:02:47,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702444793] [2021-06-05 05:02:47,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:47,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:47,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:47,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:47,246 INFO L87 Difference]: Start difference. First operand 426 states and 1297 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:47,853 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-05 05:02:48,231 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2021-06-05 05:02:48,490 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 05:02:48,848 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-06-05 05:02:49,307 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2021-06-05 05:02:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:49,320 INFO L93 Difference]: Finished difference Result 619 states and 1772 transitions. [2021-06-05 05:02:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:02:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:49,321 INFO L225 Difference]: With dead ends: 619 [2021-06-05 05:02:49,321 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 05:02:49,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2723.5ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 05:02:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 428. [2021-06-05 05:02:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.053864168618267) internal successors, (1304), 427 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1304 transitions. [2021-06-05 05:02:49,326 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1304 transitions. Word has length 20 [2021-06-05 05:02:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:49,326 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1304 transitions. [2021-06-05 05:02:49,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1304 transitions. [2021-06-05 05:02:49,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:49,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:49,327 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:49,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6203,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:49,527 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:49,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1851819088, now seen corresponding path program 53 times [2021-06-05 05:02:49,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:49,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384614323] [2021-06-05 05:02:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:49,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:49,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384614323] [2021-06-05 05:02:49,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384614323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:49,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094733623] [2021-06-05 05:02:49,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:49,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:02:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:02:49,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:50,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:50,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:50,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:50,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:50,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:50,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:50,075 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:50,084 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,088 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:02:50,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:02:50,098 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,103 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:50,108 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:02:50,112 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,117 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:50,122 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,127 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,131 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:02:50,136 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:50,141 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:02:50,145 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,150 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,154 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,159 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:50,163 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,168 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:50,172 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:50,177 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,181 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,186 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,190 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:50,194 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:50,198 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:02:50,202 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:50,206 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:50,392 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 05:02:50,392 INFO L628 ElimStorePlain]: treesize reduction 357, result has 39.2 percent of original size [2021-06-05 05:02:50,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:02:50,394 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1873, output treesize:230 [2021-06-05 05:02:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:50,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094733623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:50,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:50,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:02:50,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143934328] [2021-06-05 05:02:50,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:02:50,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:02:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:02:50,989 INFO L87 Difference]: Start difference. First operand 428 states and 1304 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:51,593 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2021-06-05 05:02:52,194 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2021-06-05 05:02:52,379 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2021-06-05 05:02:52,613 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 05:02:52,846 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2021-06-05 05:02:53,044 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 05:02:53,390 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 05:02:53,658 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 05:02:54,105 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 05:02:54,633 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2021-06-05 05:02:54,799 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2021-06-05 05:02:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:54,799 INFO L93 Difference]: Finished difference Result 709 states and 2008 transitions. [2021-06-05 05:02:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:02:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:54,800 INFO L225 Difference]: With dead ends: 709 [2021-06-05 05:02:54,800 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 05:02:54,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4224.7ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:02:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 05:02:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 437. [2021-06-05 05:02:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.0573394495412844) internal successors, (1333), 436 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1333 transitions. [2021-06-05 05:02:54,805 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1333 transitions. Word has length 20 [2021-06-05 05:02:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:54,805 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1333 transitions. [2021-06-05 05:02:54,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1333 transitions. [2021-06-05 05:02:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:02:54,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:54,806 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:55,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6233 [2021-06-05 05:02:55,006 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash 169929870, now seen corresponding path program 54 times [2021-06-05 05:02:55,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:55,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292757017] [2021-06-05 05:02:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:55,229 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 05:02:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:55,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:55,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292757017] [2021-06-05 05:02:55,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292757017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373610331] [2021-06-05 05:02:55,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:55,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:02:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:55,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:02:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:55,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:55,956 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 05:02:55,956 INFO L628 ElimStorePlain]: treesize reduction 170, result has 67.2 percent of original size [2021-06-05 05:02:55,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:55,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:55,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,090 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:02:56,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:56,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:56,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:56,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,221 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:02:56,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:56,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:56,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:56,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,338 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 05:02:56,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:56,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:56,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:56,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,451 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 05:02:56,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:56,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:02:56,456 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:56,557 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 05:02:56,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:56,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:02:56,564 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:525, output treesize:238 [2021-06-05 05:02:56,768 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 05:02:57,010 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-05 05:02:57,193 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2021-06-05 05:02:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:57,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373610331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:57,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:57,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:02:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516900107] [2021-06-05 05:02:57,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:57,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:57,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:57,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:57,533 INFO L87 Difference]: Start difference. First operand 437 states and 1333 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:58,318 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-06-05 05:02:58,935 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 132 [2021-06-05 05:02:59,570 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 137 [2021-06-05 05:02:59,770 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 05:02:59,996 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-06-05 05:03:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:00,009 INFO L93 Difference]: Finished difference Result 597 states and 1754 transitions. [2021-06-05 05:03:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:03:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:00,010 INFO L225 Difference]: With dead ends: 597 [2021-06-05 05:03:00,010 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 05:03:00,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3203.5ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 05:03:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 440. [2021-06-05 05:03:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.0546697038724373) internal successors, (1341), 439 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1341 transitions. [2021-06-05 05:03:00,015 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1341 transitions. Word has length 20 [2021-06-05 05:03:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:00,015 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1341 transitions. [2021-06-05 05:03:00,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1341 transitions. [2021-06-05 05:03:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:00,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:00,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:00,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6271,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:00,216 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:00,216 INFO L82 PathProgramCache]: Analyzing trace with hash -146181486, now seen corresponding path program 55 times [2021-06-05 05:03:00,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:00,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680805622] [2021-06-05 05:03:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:00,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:00,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680805622] [2021-06-05 05:03:00,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680805622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:00,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277699745] [2021-06-05 05:03:00,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:03:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:00,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:00,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:00,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:00,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:00,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:00,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:00,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:00,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:00,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:00,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:00,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:01,203 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 05:03:01,204 INFO L628 ElimStorePlain]: treesize reduction 368, result has 47.4 percent of original size [2021-06-05 05:03:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:01,209 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:01,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:01,214 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:01,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:01,218 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:01,456 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 05:03:01,457 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:03:01,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:01,462 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:01,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:01,467 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:01,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:01,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:01,471 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:01,586 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 05:03:01,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:01,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:01,593 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:895, output treesize:263 [2021-06-05 05:03:02,839 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1141, get_6, v_prenex_1143, v_prenex_1145, v_prenex_1147, v_prenex_1149, v_prenex_1139], 1=[v_prenex_1150, v_prenex_1140, v_prenex_1142, v_prenex_1144, v_prenex_1146, get_0, v_prenex_1148]} [2021-06-05 05:03:02,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:02,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:02,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:02,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:02,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:02,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:02,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:02,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:02,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:02,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:02,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:02,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:03,464 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 101 [2021-06-05 05:03:03,464 INFO L628 ElimStorePlain]: treesize reduction 1748, result has 16.6 percent of original size [2021-06-05 05:03:03,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:03,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:03,606 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 05:03:03,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:03,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:03:03,612 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:03,744 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:03:03,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:03,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:03:03,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:03,881 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:03:03,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:03,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:03:03,887 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:04,018 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 05:03:04,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:04,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:04,023 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:04,147 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 05:03:04,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:04,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:04,152 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:04,276 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 05:03:04,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:04,276 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1150 vanished before elimination [2021-06-05 05:03:04,276 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1140 vanished before elimination [2021-06-05 05:03:04,276 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1142 vanished before elimination [2021-06-05 05:03:04,276 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1144 vanished before elimination [2021-06-05 05:03:04,276 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1146 vanished before elimination [2021-06-05 05:03:04,276 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:03:04,276 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1148 vanished before elimination [2021-06-05 05:03:04,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:03:04,280 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2293, output treesize:253 [2021-06-05 05:03:04,619 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 05:03:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:04,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277699745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:04,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:04,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:04,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462029562] [2021-06-05 05:03:04,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:04,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:04,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:04,785 INFO L87 Difference]: Start difference. First operand 440 states and 1341 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:05,309 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-06-05 05:03:05,696 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 131 [2021-06-05 05:03:06,356 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 144 [2021-06-05 05:03:06,700 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2021-06-05 05:03:07,086 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 87 [2021-06-05 05:03:07,588 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 98 [2021-06-05 05:03:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:07,603 INFO L93 Difference]: Finished difference Result 618 states and 1797 transitions. [2021-06-05 05:03:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:03:07,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:07,604 INFO L225 Difference]: With dead ends: 618 [2021-06-05 05:03:07,604 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 05:03:07,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3449.0ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 05:03:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 443. [2021-06-05 05:03:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.0520361990950224) internal successors, (1349), 442 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1349 transitions. [2021-06-05 05:03:07,609 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1349 transitions. Word has length 20 [2021-06-05 05:03:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:07,609 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1349 transitions. [2021-06-05 05:03:07,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1349 transitions. [2021-06-05 05:03:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:07,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:07,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:07,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6348 [2021-06-05 05:03:07,812 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:07,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1844901874, now seen corresponding path program 56 times [2021-06-05 05:03:07,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:07,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843402211] [2021-06-05 05:03:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:08,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:08,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843402211] [2021-06-05 05:03:08,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843402211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:08,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595355600] [2021-06-05 05:03:08,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:08,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:08,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:03:08,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:08,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:08,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:08,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:08,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:08,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:08,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:08,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:08,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:08,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:08,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:08,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,280 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2021-06-05 05:03:09,280 INFO L628 ElimStorePlain]: treesize reduction 387, result has 50.2 percent of original size [2021-06-05 05:03:09,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:09,286 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:03:09,291 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:09,296 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,570 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 05:03:09,570 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:03:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:09,575 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:03:09,580 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:09,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:09,585 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:09,719 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 05:03:09,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:09,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:09,727 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:985, output treesize:311 [2021-06-05 05:03:09,872 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 05:03:10,386 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 130 [2021-06-05 05:03:10,725 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1192, v_prenex_1180, v_prenex_1172, v_prenex_1194, v_prenex_1174, v_prenex_1184, v_prenex_1176, get_6, v_prenex_1198, v_prenex_1186, v_prenex_1178, v_prenex_1190], 1=[v_prenex_1181, v_prenex_1191, v_prenex_1193, v_prenex_1185, v_prenex_1173, v_prenex_1195, v_prenex_1187, v_prenex_1175, v_prenex_1177, v_prenex_1199, v_prenex_1179, get_0]} [2021-06-05 05:03:10,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:10,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,228 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 108 [2021-06-05 05:03:11,228 INFO L628 ElimStorePlain]: treesize reduction 1053, result has 27.7 percent of original size [2021-06-05 05:03:11,228 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1180 vanished before elimination [2021-06-05 05:03:11,228 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1172 vanished before elimination [2021-06-05 05:03:11,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:11,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,391 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 05:03:11,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:11,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:03:11,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,544 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:03:11,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:11,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,692 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 05:03:11,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:11,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:11,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,837 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 05:03:11,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:11,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:03:11,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:11,984 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 05:03:11,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:11,985 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1198 vanished before elimination [2021-06-05 05:03:11,985 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1186 vanished before elimination [2021-06-05 05:03:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:11,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:12,121 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 05:03:12,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1190 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1181 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1191 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1193 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1185 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1173 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1195 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1187 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1175 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1177 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1199 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1179 vanished before elimination [2021-06-05 05:03:12,122 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:03:12,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-05 05:03:12,127 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 36 variables, input treesize:1463, output treesize:283 [2021-06-05 05:03:12,282 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 05:03:12,474 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 05:03:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:12,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595355600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:12,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:12,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:12,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548451074] [2021-06-05 05:03:12,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:12,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:12,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:12,565 INFO L87 Difference]: Start difference. First operand 443 states and 1349 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:13,115 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-06-05 05:03:14,239 WARN L205 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 228 [2021-06-05 05:03:14,612 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 105 [2021-06-05 05:03:14,968 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-05 05:03:15,254 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 114 [2021-06-05 05:03:15,523 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-06-05 05:03:15,722 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2021-06-05 05:03:16,301 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2021-06-05 05:03:16,518 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2021-06-05 05:03:17,232 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 102 [2021-06-05 05:03:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:17,258 INFO L93 Difference]: Finished difference Result 684 states and 1967 transitions. [2021-06-05 05:03:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:03:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:17,259 INFO L225 Difference]: With dead ends: 684 [2021-06-05 05:03:17,259 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 05:03:17,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 5706.8ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:03:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 05:03:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 437. [2021-06-05 05:03:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.055045871559633) internal successors, (1332), 436 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1332 transitions. [2021-06-05 05:03:17,263 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1332 transitions. Word has length 20 [2021-06-05 05:03:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:17,263 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1332 transitions. [2021-06-05 05:03:17,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:17,264 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1332 transitions. [2021-06-05 05:03:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:17,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:17,264 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:17,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6649,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:17,479 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1265307084, now seen corresponding path program 57 times [2021-06-05 05:03:17,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:17,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626802578] [2021-06-05 05:03:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:17,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626802578] [2021-06-05 05:03:17,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626802578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:17,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893351928] [2021-06-05 05:03:17,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:17,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:03:17,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:17,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:03:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:18,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:18,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:18,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,269 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-06-05 05:03:18,270 INFO L628 ElimStorePlain]: treesize reduction 108, result has 74.3 percent of original size [2021-06-05 05:03:18,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:18,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:18,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,436 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:03:18,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:18,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:18,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,560 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 05:03:18,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:18,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:18,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:18,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,674 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 05:03:18,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:18,680 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,780 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 05:03:18,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:18,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:18,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:18,785 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:18,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:18,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:18,891 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:525, output treesize:238 [2021-06-05 05:03:19,088 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 05:03:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:19,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893351928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:19,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:19,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:19,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721289703] [2021-06-05 05:03:19,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:19,597 INFO L87 Difference]: Start difference. First operand 437 states and 1332 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:20,045 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 106 [2021-06-05 05:03:20,355 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 05:03:20,747 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 05:03:21,244 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-06-05 05:03:21,383 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 05:03:21,812 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 05:03:21,949 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 05:03:22,139 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 05:03:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:22,140 INFO L93 Difference]: Finished difference Result 837 states and 2315 transitions. [2021-06-05 05:03:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:03:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:22,141 INFO L225 Difference]: With dead ends: 837 [2021-06-05 05:03:22,141 INFO L226 Difference]: Without dead ends: 801 [2021-06-05 05:03:22,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2935.2ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:03:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-06-05 05:03:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 445. [2021-06-05 05:03:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.0833333333333335) internal successors, (1369), 444 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1369 transitions. [2021-06-05 05:03:22,146 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1369 transitions. Word has length 20 [2021-06-05 05:03:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:22,147 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1369 transitions. [2021-06-05 05:03:22,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1369 transitions. [2021-06-05 05:03:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:22,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:22,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:22,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6826 [2021-06-05 05:03:22,348 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:22,348 INFO L82 PathProgramCache]: Analyzing trace with hash 46671724, now seen corresponding path program 58 times [2021-06-05 05:03:22,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:22,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814089401] [2021-06-05 05:03:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:22,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:22,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814089401] [2021-06-05 05:03:22,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814089401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:22,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648452116] [2021-06-05 05:03:22,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:22,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:22,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:22,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:03:22,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:23,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:23,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:23,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:23,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,266 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-06-05 05:03:23,266 INFO L628 ElimStorePlain]: treesize reduction 108, result has 74.3 percent of original size [2021-06-05 05:03:23,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:23,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,390 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:03:23,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:23,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:23,396 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,512 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:03:23,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:23,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:23,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:23,523 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,630 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 05:03:23,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:23,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:23,636 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,743 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 05:03:23,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:23,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:23,753 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:23,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:23,757 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:23,860 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 05:03:23,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:23,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:23,867 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:525, output treesize:238 [2021-06-05 05:03:24,072 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 05:03:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:24,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648452116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:24,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:24,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:24,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13728221] [2021-06-05 05:03:24,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:24,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:24,590 INFO L87 Difference]: Start difference. First operand 445 states and 1369 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:25,306 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 121 [2021-06-05 05:03:25,586 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-05 05:03:25,996 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2021-06-05 05:03:26,634 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2021-06-05 05:03:27,334 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 95 [2021-06-05 05:03:27,928 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 99 [2021-06-05 05:03:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:27,936 INFO L93 Difference]: Finished difference Result 720 states and 2052 transitions. [2021-06-05 05:03:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:03:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:27,938 INFO L225 Difference]: With dead ends: 720 [2021-06-05 05:03:27,938 INFO L226 Difference]: Without dead ends: 690 [2021-06-05 05:03:27,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3836.8ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:03:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-05 05:03:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 445. [2021-06-05 05:03:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.0833333333333335) internal successors, (1369), 444 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1369 transitions. [2021-06-05 05:03:27,943 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1369 transitions. Word has length 20 [2021-06-05 05:03:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:27,943 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1369 transitions. [2021-06-05 05:03:27,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1369 transitions. [2021-06-05 05:03:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:27,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:27,944 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:28,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6921,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:28,144 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2040599664, now seen corresponding path program 59 times [2021-06-05 05:03:28,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:28,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024272845] [2021-06-05 05:03:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:28,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024272845] [2021-06-05 05:03:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024272845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019739980] [2021-06-05 05:03:28,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:28,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:28,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:28,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:03:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:28,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:28,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:03:28,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:03:28,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:28,706 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:03:28,710 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:28,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:28,719 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:28,724 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:03:28,728 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,732 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:03:28,737 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,741 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,745 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:03:28,750 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:28,754 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:03:28,758 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:28,762 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,767 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,771 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,775 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:03:28,780 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,784 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,788 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,792 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:03:28,797 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:03:28,801 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,805 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:03:28,809 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:28,814 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,818 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,822 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:03:28,826 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:03:28,830 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:28,833 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:28,997 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 05:03:28,997 INFO L628 ElimStorePlain]: treesize reduction 313, result has 38.3 percent of original size [2021-06-05 05:03:28,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:03:28,999 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1729, output treesize:194 [2021-06-05 05:03:29,392 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-05 05:03:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:29,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019739980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:29,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:29,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:03:29,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503408899] [2021-06-05 05:03:29,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:03:29,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:29,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:03:29,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:03:29,563 INFO L87 Difference]: Start difference. First operand 445 states and 1369 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:30,218 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-06-05 05:03:30,492 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 05:03:30,831 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 05:03:31,328 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 82 [2021-06-05 05:03:31,586 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2021-06-05 05:03:32,152 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 89 [2021-06-05 05:03:32,425 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2021-06-05 05:03:32,724 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-06-05 05:03:33,055 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 05:03:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:33,074 INFO L93 Difference]: Finished difference Result 718 states and 2046 transitions. [2021-06-05 05:03:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:03:33,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:33,075 INFO L225 Difference]: With dead ends: 718 [2021-06-05 05:03:33,075 INFO L226 Difference]: Without dead ends: 697 [2021-06-05 05:03:33,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3991.5ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:03:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-06-05 05:03:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 448. [2021-06-05 05:03:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.087248322147651) internal successors, (1380), 447 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1380 transitions. [2021-06-05 05:03:33,081 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1380 transitions. Word has length 20 [2021-06-05 05:03:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:33,081 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1380 transitions. [2021-06-05 05:03:33,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1380 transitions. [2021-06-05 05:03:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:33,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:33,082 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:33,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7016 [2021-06-05 05:03:33,282 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:33,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:33,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1084178636, now seen corresponding path program 60 times [2021-06-05 05:03:33,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:33,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690992230] [2021-06-05 05:03:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:33,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690992230] [2021-06-05 05:03:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690992230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53502526] [2021-06-05 05:03:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:33,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:03:33,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:03:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:34,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:34,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:34,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:34,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:34,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:34,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:34,442 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114 [2021-06-05 05:03:34,442 INFO L628 ElimStorePlain]: treesize reduction 179, result has 69.8 percent of original size [2021-06-05 05:03:34,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:34,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:34,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:34,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:34,625 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 05:03:34,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:34,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:34,632 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:34,792 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 05:03:34,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:34,798 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:34,955 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 05:03:34,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:34,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:34,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:34,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:35,115 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 05:03:35,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:35,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:35,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:35,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:35,122 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:35,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:35,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:35,127 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:35,268 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 05:03:35,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:35,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:35,276 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:621, output treesize:316 [2021-06-05 05:03:35,513 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2021-06-05 05:03:35,733 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1260, v_prenex_1270, v_prenex_1262, v_prenex_1250, v_prenex_1264, get_6, v_prenex_1252, v_prenex_1277, v_prenex_1266, v_prenex_1254, v_prenex_1268, v_prenex_1256, v_prenex_1248, v_prenex_1258], 1=[v_prenex_1271, v_prenex_1251, v_prenex_1261, v_prenex_1253, v_prenex_1263, v_prenex_1255, v_prenex_1265, v_prenex_1257, v_prenex_1278, v_prenex_1267, v_prenex_1259, get_0, v_prenex_1269, v_prenex_1249]} [2021-06-05 05:03:35,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:35,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:35,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:35,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:35,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:35,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:36,248 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 114 [2021-06-05 05:03:36,249 INFO L628 ElimStorePlain]: treesize reduction 1077, result has 25.3 percent of original size [2021-06-05 05:03:36,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:03:36,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:36,407 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 05:03:36,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:36,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:36,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:36,557 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 05:03:36,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:36,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1250 vanished before elimination [2021-06-05 05:03:36,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:03:36,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:36,705 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 05:03:36,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:36,711 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:36,851 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 05:03:36,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:36,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1252 vanished before elimination [2021-06-05 05:03:36,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:03:36,857 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:36,999 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 05:03:36,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:37,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:37,004 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:37,140 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 05:03:37,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1254 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1268 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1256 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1248 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1258 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1271 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1251 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1261 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1253 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1263 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1255 vanished before elimination [2021-06-05 05:03:37,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1265 vanished before elimination [2021-06-05 05:03:37,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1257 vanished before elimination [2021-06-05 05:03:37,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1278 vanished before elimination [2021-06-05 05:03:37,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1267 vanished before elimination [2021-06-05 05:03:37,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1259 vanished before elimination [2021-06-05 05:03:37,141 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:03:37,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1269 vanished before elimination [2021-06-05 05:03:37,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1249 vanished before elimination [2021-06-05 05:03:37,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 28 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:03:37,145 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 42 variables, input treesize:1527, output treesize:289 [2021-06-05 05:03:37,390 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 05:03:37,888 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 05:03:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:38,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53502526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:38,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:38,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:38,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876155029] [2021-06-05 05:03:38,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:38,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:38,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:38,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:38,133 INFO L87 Difference]: Start difference. First operand 448 states and 1380 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:38,655 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 138 [2021-06-05 05:03:39,053 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-06-05 05:03:39,664 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 89 [2021-06-05 05:03:40,339 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 94 [2021-06-05 05:03:40,628 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2021-06-05 05:03:41,365 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 101 [2021-06-05 05:03:41,659 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-05 05:03:41,823 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 05:03:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:41,839 INFO L93 Difference]: Finished difference Result 686 states and 1984 transitions. [2021-06-05 05:03:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:03:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:41,841 INFO L225 Difference]: With dead ends: 686 [2021-06-05 05:03:41,841 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 05:03:41,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 4887.2ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 05:03:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 445. [2021-06-05 05:03:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.0833333333333335) internal successors, (1369), 444 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1369 transitions. [2021-06-05 05:03:41,846 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1369 transitions. Word has length 20 [2021-06-05 05:03:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:41,846 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1369 transitions. [2021-06-05 05:03:41,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1369 transitions. [2021-06-05 05:03:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:41,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:41,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:42,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7049,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:42,047 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:42,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1067241584, now seen corresponding path program 61 times [2021-06-05 05:03:42,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:42,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174268352] [2021-06-05 05:03:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:42,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174268352] [2021-06-05 05:03:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174268352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831687842] [2021-06-05 05:03:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:42,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:03:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:03:42,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:42,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:42,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:42,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:03:42,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:42,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:42,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:42,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:03:42,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:42,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:42,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:42,783 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,073 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 05:03:43,073 INFO L628 ElimStorePlain]: treesize reduction 394, result has 46.4 percent of original size [2021-06-05 05:03:43,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:43,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:43,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:43,088 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,302 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 05:03:43,303 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:03:43,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:43,308 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:43,313 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:43,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,517 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 05:03:43,518 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:03:43,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:43,524 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:841, output treesize:228 [2021-06-05 05:03:43,968 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 05:03:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:44,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831687842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:44,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:44,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:44,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143967638] [2021-06-05 05:03:44,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:44,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:44,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:44,241 INFO L87 Difference]: Start difference. First operand 445 states and 1369 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:44,727 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-06-05 05:03:45,090 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 122 [2021-06-05 05:03:45,424 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-06-05 05:03:45,794 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 86 [2021-06-05 05:03:45,948 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 05:03:46,330 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 97 [2021-06-05 05:03:46,575 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 05:03:47,045 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 102 [2021-06-05 05:03:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:47,106 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2021-06-05 05:03:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:03:47,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:47,107 INFO L225 Difference]: With dead ends: 680 [2021-06-05 05:03:47,107 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 05:03:47,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3290.0ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:03:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 05:03:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 447. [2021-06-05 05:03:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.0896860986547083) internal successors, (1378), 446 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1378 transitions. [2021-06-05 05:03:47,113 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1378 transitions. Word has length 20 [2021-06-05 05:03:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:47,113 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1378 transitions. [2021-06-05 05:03:47,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1378 transitions. [2021-06-05 05:03:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:47,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:47,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:47,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7122 [2021-06-05 05:03:47,314 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2087441876, now seen corresponding path program 62 times [2021-06-05 05:03:47,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:47,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88686133] [2021-06-05 05:03:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:47,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:47,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88686133] [2021-06-05 05:03:47,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88686133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:47,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471900472] [2021-06-05 05:03:47,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:47,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:47,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:03:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:48,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:48,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:48,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:03:48,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,444 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-06-05 05:03:48,445 INFO L628 ElimStorePlain]: treesize reduction 112, result has 75.2 percent of original size [2021-06-05 05:03:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:48,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:48,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,591 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 05:03:48,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:48,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:48,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:48,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,726 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:03:48,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:48,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:48,731 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,853 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 05:03:48,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:48,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:48,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:48,979 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 05:03:48,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:48,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:48,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:48,985 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:49,102 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 05:03:49,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:49,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:49,109 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:561, output treesize:265 [2021-06-05 05:03:49,333 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2021-06-05 05:03:49,999 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1317, v_prenex_1319, get_6, v_prenex_1321, v_prenex_1323, v_prenex_1325, v_prenex_1327], 1=[v_prenex_1318, v_prenex_1328, v_prenex_1320, v_prenex_1322, get_0, v_prenex_1324, v_prenex_1326]} [2021-06-05 05:03:50,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 05:03:50,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:03:50,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:03:50,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:03:50,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:50,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:03:50,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,621 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 102 [2021-06-05 05:03:50,622 INFO L628 ElimStorePlain]: treesize reduction 1739, result has 17.0 percent of original size [2021-06-05 05:03:50,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:50,628 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,772 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 05:03:50,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:50,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:50,778 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,921 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 05:03:50,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:03:50,927 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:51,066 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:03:51,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:03:51,072 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:51,212 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 05:03:51,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:51,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:03:51,217 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:51,350 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 05:03:51,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:03:51,355 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:51,484 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 05:03:51,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:51,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1318 vanished before elimination [2021-06-05 05:03:51,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1328 vanished before elimination [2021-06-05 05:03:51,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1320 vanished before elimination [2021-06-05 05:03:51,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1322 vanished before elimination [2021-06-05 05:03:51,485 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:03:51,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1324 vanished before elimination [2021-06-05 05:03:51,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1326 vanished before elimination [2021-06-05 05:03:51,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:03:51,489 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2269, output treesize:254 [2021-06-05 05:03:51,618 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 05:03:52,115 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-06-05 05:03:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:52,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471900472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:52,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:52,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:52,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773026335] [2021-06-05 05:03:52,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:52,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:52,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:52,335 INFO L87 Difference]: Start difference. First operand 447 states and 1378 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:52,824 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 05:03:53,220 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 133 [2021-06-05 05:03:53,709 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2021-06-05 05:03:54,321 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-06-05 05:03:54,469 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-06-05 05:03:55,171 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 96 [2021-06-05 05:03:55,342 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-06-05 05:03:56,109 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 103 [2021-06-05 05:03:56,408 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-06-05 05:03:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:56,473 INFO L93 Difference]: Finished difference Result 670 states and 1973 transitions. [2021-06-05 05:03:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:03:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:03:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:56,474 INFO L225 Difference]: With dead ends: 670 [2021-06-05 05:03:56,474 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 05:03:56,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5071.0ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:03:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 05:03:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 445. [2021-06-05 05:03:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.0833333333333335) internal successors, (1369), 444 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1369 transitions. [2021-06-05 05:03:56,479 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1369 transitions. Word has length 20 [2021-06-05 05:03:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:56,479 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1369 transitions. [2021-06-05 05:03:56,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1369 transitions. [2021-06-05 05:03:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:03:56,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:56,480 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:56,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7201 [2021-06-05 05:03:56,680 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash -322665892, now seen corresponding path program 63 times [2021-06-05 05:03:56,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:56,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137098448] [2021-06-05 05:03:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:57,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:57,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137098448] [2021-06-05 05:03:57,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137098448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:57,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057071065] [2021-06-05 05:03:57,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:57,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:03:57,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:03:57,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:03:57,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:57,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:03:57,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:57,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:03:57,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:57,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,739 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-06-05 05:03:57,739 INFO L628 ElimStorePlain]: treesize reduction 396, result has 46.5 percent of original size [2021-06-05 05:03:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:57,744 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:57,749 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:03:57,754 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,981 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 05:03:57,981 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:03:57,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:03:57,987 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:03:57,992 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:03:57,996 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:58,183 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 05:03:58,183 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:03:58,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:03:58,190 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:847, output treesize:231 [2021-06-05 05:03:58,496 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-06-05 05:03:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:58,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057071065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:58,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:58,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:03:58,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818262510] [2021-06-05 05:03:58,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:58,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:58,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:58,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:58,827 INFO L87 Difference]: Start difference. First operand 445 states and 1369 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:59,327 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 05:03:59,659 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 05:04:00,006 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 125 [2021-06-05 05:04:00,641 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 140 [2021-06-05 05:04:00,865 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2021-06-05 05:04:01,128 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 05:04:01,323 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 05:04:01,643 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-05 05:04:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:01,678 INFO L93 Difference]: Finished difference Result 633 states and 1852 transitions. [2021-06-05 05:04:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:04:01,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:01,679 INFO L225 Difference]: With dead ends: 633 [2021-06-05 05:04:01,680 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 05:04:01,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3324.3ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:04:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 05:04:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 451. [2021-06-05 05:04:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.077777777777778) internal successors, (1385), 450 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1385 transitions. [2021-06-05 05:04:01,684 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1385 transitions. Word has length 20 [2021-06-05 05:04:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:01,684 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1385 transitions. [2021-06-05 05:04:01,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1385 transitions. [2021-06-05 05:04:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:01,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:01,685 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:01,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7369,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:01,885 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash -638777248, now seen corresponding path program 64 times [2021-06-05 05:04:01,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:01,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269673732] [2021-06-05 05:04:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:02,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:02,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269673732] [2021-06-05 05:04:02,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269673732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:02,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890777062] [2021-06-05 05:04:02,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:02,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:02,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:04:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:02,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:02,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:02,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:02,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:02,592 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:02,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:02,603 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,872 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 05:04:02,872 INFO L628 ElimStorePlain]: treesize reduction 355, result has 48.2 percent of original size [2021-06-05 05:04:02,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:02,878 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:02,883 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:02,887 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:03,081 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 05:04:03,081 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:04:03,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:03,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:03,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:03,087 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:03,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:03,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:03,091 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:03,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:03,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:03,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:03,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:03,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:04:03,194 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:847, output treesize:231 [2021-06-05 05:04:03,697 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 05:04:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:03,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890777062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:03,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:03,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:03,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625458507] [2021-06-05 05:04:03,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:03,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:03,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:03,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:03,857 INFO L87 Difference]: Start difference. First operand 451 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:04,537 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-06-05 05:04:04,876 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 118 [2021-06-05 05:04:05,165 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-06-05 05:04:05,564 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-06-05 05:04:06,065 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 85 [2021-06-05 05:04:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:06,078 INFO L93 Difference]: Finished difference Result 617 states and 1809 transitions. [2021-06-05 05:04:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:06,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:06,079 INFO L225 Difference]: With dead ends: 617 [2021-06-05 05:04:06,079 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 05:04:06,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2742.0ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:04:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 05:04:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 457. [2021-06-05 05:04:06,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.0723684210526314) internal successors, (1401), 456 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1401 transitions. [2021-06-05 05:04:06,084 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1401 transitions. Word has length 20 [2021-06-05 05:04:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:06,084 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1401 transitions. [2021-06-05 05:04:06,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1401 transitions. [2021-06-05 05:04:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:06,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:06,085 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:06,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7456 [2021-06-05 05:04:06,285 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1957469660, now seen corresponding path program 65 times [2021-06-05 05:04:06,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:06,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278653566] [2021-06-05 05:04:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:06,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278653566] [2021-06-05 05:04:06,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278653566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347439471] [2021-06-05 05:04:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:06,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:04:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:06,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:06,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:06,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:06,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:06,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:06,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:06,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:06,994 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:06,998 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:07,002 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:07,007 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:07,011 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:07,015 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:07,019 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:07,024 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:07,028 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:07,032 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:07,036 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:07,040 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:07,044 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:07,048 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:07,053 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:07,057 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:07,061 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,263 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 05:04:07,263 INFO L628 ElimStorePlain]: treesize reduction 168, result has 61.2 percent of original size [2021-06-05 05:04:07,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 05:04:07,266 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1009, output treesize:265 [2021-06-05 05:04:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347439471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:07,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:07,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:04:07,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143564867] [2021-06-05 05:04:07,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:04:07,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:04:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:04:07,858 INFO L87 Difference]: Start difference. First operand 457 states and 1401 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:08,477 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 05:04:08,836 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-06-05 05:04:09,029 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2021-06-05 05:04:09,345 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 05:04:09,621 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 05:04:10,049 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-05 05:04:10,568 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-06-05 05:04:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:10,589 INFO L93 Difference]: Finished difference Result 625 states and 1837 transitions. [2021-06-05 05:04:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:04:10,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:10,590 INFO L225 Difference]: With dead ends: 625 [2021-06-05 05:04:10,590 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 05:04:10,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3263.1ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:04:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 05:04:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 448. [2021-06-05 05:04:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.0738255033557045) internal successors, (1374), 447 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1374 transitions. [2021-06-05 05:04:10,595 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1374 transitions. Word has length 20 [2021-06-05 05:04:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:10,595 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1374 transitions. [2021-06-05 05:04:10,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1374 transitions. [2021-06-05 05:04:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:10,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:10,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:10,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7535,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:10,796 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash 266313232, now seen corresponding path program 66 times [2021-06-05 05:04:10,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:10,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216946612] [2021-06-05 05:04:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:11,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:11,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216946612] [2021-06-05 05:04:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216946612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586756832] [2021-06-05 05:04:11,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:11,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:04:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:11,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:04:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:11,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:11,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:11,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:11,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:11,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:11,777 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 05:04:11,778 INFO L628 ElimStorePlain]: treesize reduction 150, result has 68.5 percent of original size [2021-06-05 05:04:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:11,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:11,893 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:04:11,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:11,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:12,008 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:04:12,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:12,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:12,013 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:12,120 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:04:12,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:12,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:12,126 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:12,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:12,131 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:12,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:12,238 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:12,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:12,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:12,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:04:12,336 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:505, output treesize:223 [2021-06-05 05:04:12,520 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 05:04:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586756832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122392951] [2021-06-05 05:04:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:12,927 INFO L87 Difference]: Start difference. First operand 448 states and 1374 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:13,379 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-05 05:04:13,664 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-06-05 05:04:13,991 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2021-06-05 05:04:14,213 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 05:04:14,489 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-06-05 05:04:14,834 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 84 [2021-06-05 05:04:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:14,847 INFO L93 Difference]: Finished difference Result 621 states and 1813 transitions. [2021-06-05 05:04:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:14,848 INFO L225 Difference]: With dead ends: 621 [2021-06-05 05:04:14,848 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 05:04:14,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2442.2ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:04:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 05:04:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 454. [2021-06-05 05:04:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.068432671081678) internal successors, (1390), 453 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1390 transitions. [2021-06-05 05:04:14,852 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1390 transitions. Word has length 20 [2021-06-05 05:04:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:14,853 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1390 transitions. [2021-06-05 05:04:14,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1390 transitions. [2021-06-05 05:04:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:14,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:14,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:15,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7583 [2021-06-05 05:04:15,054 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:15,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1432407156, now seen corresponding path program 67 times [2021-06-05 05:04:15,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:15,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915688574] [2021-06-05 05:04:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:15,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915688574] [2021-06-05 05:04:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915688574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063067307] [2021-06-05 05:04:15,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:04:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:16,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:16,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:16,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:16,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:16,073 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:16,079 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,433 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 05:04:16,433 INFO L628 ElimStorePlain]: treesize reduction 442, result has 47.4 percent of original size [2021-06-05 05:04:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:16,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:16,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:16,450 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,747 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 05:04:16,748 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:04:16,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:16,753 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:16,759 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:16,764 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,013 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 05:04:17,014 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:04:17,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:04:17,021 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:955, output treesize:285 [2021-06-05 05:04:17,781 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1391, v_prenex_1393, get_6, v_prenex_1395, v_prenex_1397, v_prenex_1389, v_prenex_1399], 1=[v_prenex_1390, get_3, v_prenex_1392, v_prenex_1394, v_prenex_1396, v_prenex_1398, v_prenex_1388]} [2021-06-05 05:04:17,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:17,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:04:17,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:04:17,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:04:17,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 05:04:17,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:04:17,846 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:18,425 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 102 [2021-06-05 05:04:18,425 INFO L628 ElimStorePlain]: treesize reduction 1819, result has 17.5 percent of original size [2021-06-05 05:04:18,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:04:18,432 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:18,610 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 05:04:18,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:18,617 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:18,772 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:04:18,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:18,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:04:18,779 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:18,926 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:04:18,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:18,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:18,933 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:19,078 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 05:04:19,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:19,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:19,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:19,226 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 05:04:19,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:19,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:19,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:19,372 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 05:04:19,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:19,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1390 vanished before elimination [2021-06-05 05:04:19,372 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:04:19,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1392 vanished before elimination [2021-06-05 05:04:19,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1394 vanished before elimination [2021-06-05 05:04:19,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1396 vanished before elimination [2021-06-05 05:04:19,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1398 vanished before elimination [2021-06-05 05:04:19,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1388 vanished before elimination [2021-06-05 05:04:19,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:04:19,376 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2389, output treesize:292 [2021-06-05 05:04:19,517 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-05 05:04:19,718 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 05:04:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063067307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:19,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:19,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267842834] [2021-06-05 05:04:19,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:19,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:19,856 INFO L87 Difference]: Start difference. First operand 454 states and 1390 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:20,324 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 05:04:20,636 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 05:04:21,020 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 123 [2021-06-05 05:04:21,365 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-06-05 05:04:21,777 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-06-05 05:04:22,242 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 94 [2021-06-05 05:04:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:22,274 INFO L93 Difference]: Finished difference Result 622 states and 1819 transitions. [2021-06-05 05:04:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:22,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:22,275 INFO L225 Difference]: With dead ends: 622 [2021-06-05 05:04:22,275 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 05:04:22,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3067.1ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:04:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 05:04:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 451. [2021-06-05 05:04:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.071111111111111) internal successors, (1382), 450 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1382 transitions. [2021-06-05 05:04:22,280 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1382 transitions. Word has length 20 [2021-06-05 05:04:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:22,280 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1382 transitions. [2021-06-05 05:04:22,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1382 transitions. [2021-06-05 05:04:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:22,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:22,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:22,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7677 [2021-06-05 05:04:22,481 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1605654848, now seen corresponding path program 68 times [2021-06-05 05:04:22,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:22,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312007407] [2021-06-05 05:04:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:22,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:22,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312007407] [2021-06-05 05:04:22,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312007407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:22,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098176800] [2021-06-05 05:04:22,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:22,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:22,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:04:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:23,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:23,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:23,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:23,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:23,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:23,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:23,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:23,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:23,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:23,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:23,658 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,166 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2021-06-05 05:04:24,166 INFO L628 ElimStorePlain]: treesize reduction 599, result has 48.0 percent of original size [2021-06-05 05:04:24,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:24,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:24,179 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:24,185 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,400 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:04:24,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:24,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:24,407 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:24,413 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:24,419 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,813 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 05:04:24,814 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-06-05 05:04:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:24,820 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:24,826 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:24,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:24,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:24,831 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,030 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 05:04:25,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:25,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-06-05 05:04:25,041 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1321, output treesize:447 [2021-06-05 05:04:25,261 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 05:04:25,579 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 119 [2021-06-05 05:04:25,889 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1417, v_prenex_1427, v_prenex_1419, v_prenex_1429, get_6, v_prenex_1421, v_prenex_1423, v_prenex_1425], 1=[v_prenex_1428, get_3, v_prenex_1416, v_prenex_1418, v_prenex_1420, v_prenex_1422, v_prenex_1424, v_prenex_1426]} [2021-06-05 05:04:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:25,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:25,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:25,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:25,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:25,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:25,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:26,594 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 123 [2021-06-05 05:04:26,594 INFO L628 ElimStorePlain]: treesize reduction 2185, result has 15.3 percent of original size [2021-06-05 05:04:26,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:04:26,601 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:26,751 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 05:04:26,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:26,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:26,758 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:26,901 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 05:04:26,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:26,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:26,907 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,048 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 05:04:27,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:27,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:04:27,055 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,192 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 05:04:27,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:27,198 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,334 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:04:27,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:27,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:27,340 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,472 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:04:27,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:27,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:04:27,477 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,603 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:04:27,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1428 vanished before elimination [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1416 vanished before elimination [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1418 vanished before elimination [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1420 vanished before elimination [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1422 vanished before elimination [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1424 vanished before elimination [2021-06-05 05:04:27,604 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1426 vanished before elimination [2021-06-05 05:04:27,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 05:04:27,608 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 24 variables, input treesize:2755, output treesize:272 [2021-06-05 05:04:27,816 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 05:04:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:27,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098176800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:27,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:27,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:27,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915667273] [2021-06-05 05:04:27,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:27,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:27,947 INFO L87 Difference]: Start difference. First operand 451 states and 1382 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,277 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-06-05 05:04:28,711 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 162 [2021-06-05 05:04:29,339 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 179 [2021-06-05 05:04:29,561 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 05:04:29,840 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 05:04:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:29,856 INFO L93 Difference]: Finished difference Result 595 states and 1763 transitions. [2021-06-05 05:04:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:29,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:29,857 INFO L225 Difference]: With dead ends: 595 [2021-06-05 05:04:29,857 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 05:04:29,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2990.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:04:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 05:04:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 448. [2021-06-05 05:04:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.0738255033557045) internal successors, (1374), 447 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1374 transitions. [2021-06-05 05:04:29,862 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1374 transitions. Word has length 20 [2021-06-05 05:04:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:29,862 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1374 transitions. [2021-06-05 05:04:29,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1374 transitions. [2021-06-05 05:04:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:29,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:29,863 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:30,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7955,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:30,063 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash -917231582, now seen corresponding path program 69 times [2021-06-05 05:04:30,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:30,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629619979] [2021-06-05 05:04:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:30,476 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 05:04:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:30,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:30,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629619979] [2021-06-05 05:04:30,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629619979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:30,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229629542] [2021-06-05 05:04:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:30,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:04:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:30,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:30,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:30,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,780 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:30,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:30,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,802 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:30,807 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:04:30,811 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:30,816 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,820 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:30,824 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:04:30,828 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,832 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,837 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:30,841 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:04:30,845 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,849 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,853 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,858 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:30,862 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:30,866 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:04:30,870 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,875 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,879 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,883 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,887 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:30,891 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:30,895 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:30,899 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:30,903 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:30,907 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:30,911 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:30,914 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:31,077 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 05:04:31,078 INFO L628 ElimStorePlain]: treesize reduction 313, result has 38.3 percent of original size [2021-06-05 05:04:31,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:04:31,080 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1729, output treesize:194 [2021-06-05 05:04:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229629542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:31,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470550811] [2021-06-05 05:04:31,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:31,541 INFO L87 Difference]: Start difference. First operand 448 states and 1374 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,160 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-06-05 05:04:32,389 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 05:04:32,708 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2021-06-05 05:04:33,132 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 83 [2021-06-05 05:04:33,593 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 91 [2021-06-05 05:04:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:33,606 INFO L93 Difference]: Finished difference Result 673 states and 1944 transitions. [2021-06-05 05:04:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:33,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:33,609 INFO L225 Difference]: With dead ends: 673 [2021-06-05 05:04:33,609 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 05:04:33,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2654.4ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:04:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 05:04:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 452. [2021-06-05 05:04:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0864745011086474) internal successors, (1392), 451 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1392 transitions. [2021-06-05 05:04:33,615 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1392 transitions. Word has length 20 [2021-06-05 05:04:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:33,615 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1392 transitions. [2021-06-05 05:04:33,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,615 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1392 transitions. [2021-06-05 05:04:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:33,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:33,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:33,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8156 [2021-06-05 05:04:33,816 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:33,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2135866942, now seen corresponding path program 70 times [2021-06-05 05:04:33,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:33,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380103136] [2021-06-05 05:04:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:34,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380103136] [2021-06-05 05:04:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380103136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:34,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749699339] [2021-06-05 05:04:34,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:34,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:34,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:04:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:34,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:34,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:34,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,799 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-06-05 05:04:34,800 INFO L628 ElimStorePlain]: treesize reduction 106, result has 74.6 percent of original size [2021-06-05 05:04:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:34,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:34,810 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,926 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:04:34,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:34,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:34,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,049 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:04:35,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:35,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:35,054 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,166 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 05:04:35,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:35,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:35,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:35,172 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:35,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:35,177 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,280 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 05:04:35,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:35,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:35,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:35,285 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,391 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 05:04:35,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:35,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:04:35,398 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:525, output treesize:238 [2021-06-05 05:04:35,607 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 05:04:35,937 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 05:04:36,108 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-05 05:04:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:36,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749699339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:36,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:36,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:36,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727182159] [2021-06-05 05:04:36,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:36,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:36,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:36,289 INFO L87 Difference]: Start difference. First operand 452 states and 1392 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:36,767 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 05:04:37,171 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 127 [2021-06-05 05:04:37,427 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-06-05 05:04:37,766 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2021-06-05 05:04:38,178 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 90 [2021-06-05 05:04:38,733 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 94 [2021-06-05 05:04:39,128 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 99 [2021-06-05 05:04:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:39,135 INFO L93 Difference]: Finished difference Result 671 states and 1941 transitions. [2021-06-05 05:04:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:04:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:39,136 INFO L225 Difference]: With dead ends: 671 [2021-06-05 05:04:39,136 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 05:04:39,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3583.3ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:04:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 05:04:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 450. [2021-06-05 05:04:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.084632516703786) internal successors, (1385), 449 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1385 transitions. [2021-06-05 05:04:39,141 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1385 transitions. Word has length 20 [2021-06-05 05:04:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:39,142 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1385 transitions. [2021-06-05 05:04:39,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1385 transitions. [2021-06-05 05:04:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:39,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:39,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:39,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8192,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:39,343 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash 71828966, now seen corresponding path program 71 times [2021-06-05 05:04:39,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:39,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887911193] [2021-06-05 05:04:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:39,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887911193] [2021-06-05 05:04:39,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887911193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183539705] [2021-06-05 05:04:39,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:39,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:04:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:39,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:39,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:39,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:39,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:39,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:39,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:39,941 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:39,946 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:39,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:39,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:39,959 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:39,964 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:04:39,969 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:04:39,975 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:39,980 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:39,985 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:39,991 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:39,995 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:40,000 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:04:40,005 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:40,010 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:40,014 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:40,019 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:40,023 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:04:40,028 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:40,035 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:40,039 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:40,043 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:40,047 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:04:40,051 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:40,056 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:40,060 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:40,064 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:40,068 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:40,073 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:40,077 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:04:40,080 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,245 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 05:04:40,246 INFO L628 ElimStorePlain]: treesize reduction 323, result has 37.5 percent of original size [2021-06-05 05:04:40,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:04:40,247 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1729, output treesize:194 [2021-06-05 05:04:40,577 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-06-05 05:04:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:40,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183539705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:40,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:04:40,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97886465] [2021-06-05 05:04:40,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:04:40,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:04:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:04:40,735 INFO L87 Difference]: Start difference. First operand 450 states and 1385 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,417 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2021-06-05 05:04:41,625 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 05:04:42,073 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-06-05 05:04:42,533 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 76 [2021-06-05 05:04:43,084 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 85 [2021-06-05 05:04:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:43,098 INFO L93 Difference]: Finished difference Result 704 states and 2012 transitions. [2021-06-05 05:04:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:43,099 INFO L225 Difference]: With dead ends: 704 [2021-06-05 05:04:43,099 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 05:04:43,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2844.2ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:04:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 05:04:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 453. [2021-06-05 05:04:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.088495575221239) internal successors, (1396), 452 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1396 transitions. [2021-06-05 05:04:43,104 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1396 transitions. Word has length 20 [2021-06-05 05:04:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:43,104 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1396 transitions. [2021-06-05 05:04:43,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1396 transitions. [2021-06-05 05:04:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:43,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:43,105 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:43,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8263 [2021-06-05 05:04:43,305 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1098360030, now seen corresponding path program 72 times [2021-06-05 05:04:43,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:43,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432683253] [2021-06-05 05:04:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:43,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:43,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432683253] [2021-06-05 05:04:43,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432683253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:43,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510396138] [2021-06-05 05:04:43,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:43,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:04:43,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:43,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:04:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:44,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:44,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:44,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:44,602 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 116 [2021-06-05 05:04:44,603 INFO L628 ElimStorePlain]: treesize reduction 203, result has 68.8 percent of original size [2021-06-05 05:04:44,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:44,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:44,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:44,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:44,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:44,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:44,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:44,804 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 05:04:44,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:44,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:44,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:44,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:44,998 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 05:04:44,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:45,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:45,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:45,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,180 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 05:04:45,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:45,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:45,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:45,192 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,350 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:04:45,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:45,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:45,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,512 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:04:45,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:45,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:04:45,520 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:657, output treesize:343 [2021-06-05 05:04:45,790 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 113 [2021-06-05 05:04:46,059 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1480, v_prenex_1470, get_6, v_prenex_1472, v_prenex_1474, v_prenex_1476, v_prenex_1478], 1=[get_3, v_prenex_1471, v_prenex_1473, v_prenex_1475, v_prenex_1477, v_prenex_1479, v_prenex_1469]} [2021-06-05 05:04:46,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:46,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:46,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:46,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:46,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:46,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:46,124 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,751 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 121 [2021-06-05 05:04:46,751 INFO L628 ElimStorePlain]: treesize reduction 1964, result has 17.6 percent of original size [2021-06-05 05:04:46,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:04:46,758 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,928 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 05:04:46,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:46,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:04:46,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,110 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 05:04:47,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:47,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:04:47,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,283 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 05:04:47,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:47,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:04:47,289 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,458 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 05:04:47,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:47,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:04:47,465 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,619 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 05:04:47,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:47,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:04:47,624 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,775 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:04:47,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:47,776 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:04:47,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1471 vanished before elimination [2021-06-05 05:04:47,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1473 vanished before elimination [2021-06-05 05:04:47,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1475 vanished before elimination [2021-06-05 05:04:47,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1477 vanished before elimination [2021-06-05 05:04:47,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1479 vanished before elimination [2021-06-05 05:04:47,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1469 vanished before elimination [2021-06-05 05:04:47,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:04:47,781 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2497, output treesize:328 [2021-06-05 05:04:48,053 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 05:04:48,627 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 05:04:48,869 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 05:04:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:48,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510396138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:48,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:48,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268746058] [2021-06-05 05:04:48,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:48,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:48,999 INFO L87 Difference]: Start difference. First operand 453 states and 1396 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,465 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2021-06-05 05:04:49,778 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 05:04:50,257 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 05:04:50,898 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-06-05 05:04:51,625 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 83 [2021-06-05 05:04:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:51,647 INFO L93 Difference]: Finished difference Result 688 states and 1992 transitions. [2021-06-05 05:04:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:51,648 INFO L225 Difference]: With dead ends: 688 [2021-06-05 05:04:51,648 INFO L226 Difference]: Without dead ends: 673 [2021-06-05 05:04:51,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 4092.9ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:04:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-05 05:04:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 450. [2021-06-05 05:04:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.084632516703786) internal successors, (1385), 449 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1385 transitions. [2021-06-05 05:04:51,653 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1385 transitions. Word has length 20 [2021-06-05 05:04:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:51,654 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1385 transitions. [2021-06-05 05:04:51,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1385 transitions. [2021-06-05 05:04:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:51,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:51,654 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:51,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8297,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:51,855 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:51,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1115297082, now seen corresponding path program 73 times [2021-06-05 05:04:51,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:51,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140422664] [2021-06-05 05:04:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:52,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140422664] [2021-06-05 05:04:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140422664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808571863] [2021-06-05 05:04:52,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:04:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:52,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:52,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:52,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:52,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:04:52,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:04:52,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:52,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,803 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 05:04:52,804 INFO L628 ElimStorePlain]: treesize reduction 396, result has 46.3 percent of original size [2021-06-05 05:04:52,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:52,809 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:52,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:52,817 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,050 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 05:04:53,050 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:04:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:53,056 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:53,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:53,060 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:53,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:04:53,065 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,255 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 05:04:53,255 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:04:53,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:04:53,262 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:841, output treesize:228 [2021-06-05 05:04:53,714 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 05:04:53,961 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-05 05:04:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:54,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808571863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:54,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:54,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:04:54,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925227415] [2021-06-05 05:04:54,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:54,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:54,135 INFO L87 Difference]: Start difference. First operand 450 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,582 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-05 05:04:54,962 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 116 [2021-06-05 05:04:55,285 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-05 05:04:55,764 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-06-05 05:04:56,227 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 78 [2021-06-05 05:04:56,817 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-06-05 05:04:57,262 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 87 [2021-06-05 05:04:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:57,270 INFO L93 Difference]: Finished difference Result 711 states and 2032 transitions. [2021-06-05 05:04:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:04:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:04:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:57,271 INFO L225 Difference]: With dead ends: 711 [2021-06-05 05:04:57,271 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 05:04:57,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3740.9ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:04:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 05:04:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 452. [2021-06-05 05:04:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.090909090909091) internal successors, (1394), 451 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1394 transitions. [2021-06-05 05:04:57,277 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1394 transitions. Word has length 20 [2021-06-05 05:04:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:57,277 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1394 transitions. [2021-06-05 05:04:57,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1394 transitions. [2021-06-05 05:04:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:04:57,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:57,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:57,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8453,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:57,478 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash 24986754, now seen corresponding path program 74 times [2021-06-05 05:04:57,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:57,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500459256] [2021-06-05 05:04:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:57,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500459256] [2021-06-05 05:04:57,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500459256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632086591] [2021-06-05 05:04:57,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:57,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:57,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:04:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:58,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:04:58,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:58,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:04:58,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,661 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2021-06-05 05:04:58,661 INFO L628 ElimStorePlain]: treesize reduction 118, result has 75.6 percent of original size [2021-06-05 05:04:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:58,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:58,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,821 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 05:04:58,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:58,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:58,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,974 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 05:04:58,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:58,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:58,981 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:58,986 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:59,130 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 05:04:59,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:59,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:59,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:04:59,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:59,274 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 05:04:59,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:59,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:59,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:59,279 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:59,415 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 05:04:59,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:59,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:04:59,422 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:597, output treesize:292 [2021-06-05 05:04:59,672 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2021-06-05 05:04:59,890 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_1530, v_prenex_1540, v_prenex_1532, v_prenex_1520, v_prenex_1534, v_prenex_1522, v_prenex_1544, v_prenex_1536, v_prenex_1524, v_prenex_1538, v_prenex_1526, v_prenex_1518, v_prenex_1528], 1=[get_3, v_prenex_1521, v_prenex_1543, v_prenex_1531, v_prenex_1523, v_prenex_1533, v_prenex_1525, v_prenex_1535, v_prenex_1527, v_prenex_1537, v_prenex_1529, v_prenex_1539, v_prenex_1517, v_prenex_1519]} [2021-06-05 05:04:59,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 05:04:59,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:59,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:04:59,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:59,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:04:59,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,403 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 102 [2021-06-05 05:05:00,404 INFO L628 ElimStorePlain]: treesize reduction 1022, result has 25.8 percent of original size [2021-06-05 05:05:00,404 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1530 vanished before elimination [2021-06-05 05:05:00,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:00,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,555 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 05:05:00,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:00,555 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1532 vanished before elimination [2021-06-05 05:05:00,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:00,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,706 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 05:05:00,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:00,706 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1534 vanished before elimination [2021-06-05 05:05:00,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:00,712 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,859 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:05:00,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:00,859 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1544 vanished before elimination [2021-06-05 05:05:00,859 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1536 vanished before elimination [2021-06-05 05:05:00,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:05:00,864 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:01,004 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 05:05:01,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:01,004 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1538 vanished before elimination [2021-06-05 05:05:01,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:01,009 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:01,145 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 05:05:01,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:01,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:01,150 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:01,280 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 05:05:01,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1528 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1521 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1543 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1531 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1523 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1533 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1525 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1535 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1527 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1537 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1529 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1539 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1517 vanished before elimination [2021-06-05 05:05:01,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1519 vanished before elimination [2021-06-05 05:05:01,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 28 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:05:01,285 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 42 variables, input treesize:1471, output treesize:254 [2021-06-05 05:05:01,414 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 05:05:01,791 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-06-05 05:05:01,984 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 05:05:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:02,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632086591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:02,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:02,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:02,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13065748] [2021-06-05 05:05:02,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:02,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:02,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:02,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:02,103 INFO L87 Difference]: Start difference. First operand 452 states and 1394 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,984 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 124 [2021-06-05 05:05:03,379 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-06-05 05:05:04,035 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2021-06-05 05:05:04,781 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 92 [2021-06-05 05:05:05,535 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 99 [2021-06-05 05:05:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:05,561 INFO L93 Difference]: Finished difference Result 697 states and 2016 transitions. [2021-06-05 05:05:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:05,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:05,562 INFO L225 Difference]: With dead ends: 697 [2021-06-05 05:05:05,562 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 05:05:05,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4362.2ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:05:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 05:05:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 450. [2021-06-05 05:05:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.084632516703786) internal successors, (1385), 449 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1385 transitions. [2021-06-05 05:05:05,567 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1385 transitions. Word has length 20 [2021-06-05 05:05:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:05,567 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1385 transitions. [2021-06-05 05:05:05,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1385 transitions. [2021-06-05 05:05:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:05,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:05,568 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:05,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8532 [2021-06-05 05:05:05,769 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -82608552, now seen corresponding path program 75 times [2021-06-05 05:05:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:05,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762618387] [2021-06-05 05:05:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:06,072 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 05:05:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:06,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762618387] [2021-06-05 05:05:06,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762618387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787851556] [2021-06-05 05:05:06,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:06,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:05:06,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:06,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:06,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:06,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:05:06,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:06,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:05:06,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:06,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,289 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-06-05 05:05:07,289 INFO L628 ElimStorePlain]: treesize reduction 434, result has 49.1 percent of original size [2021-06-05 05:05:07,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:07,295 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:07,301 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:07,306 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,615 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-06-05 05:05:07,615 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:05:07,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:07,621 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:07,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:07,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:07,631 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,783 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 05:05:07,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:07,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:05:07,792 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:1039, output treesize:341 [2021-06-05 05:05:08,070 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 113 [2021-06-05 05:05:08,638 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 139 [2021-06-05 05:05:09,021 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1581, get_6, v_prenex_1583, v_prenex_1585, v_prenex_1573, v_prenex_1587, v_prenex_1575, v_prenex_1589, v_prenex_1577, v_prenex_1579], 1=[get_3, v_prenex_1580, v_prenex_1572, v_prenex_1582, v_prenex_1574, v_prenex_1584, v_prenex_1576, v_prenex_1586, v_prenex_1578, v_prenex_1588]} [2021-06-05 05:05:09,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:09,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:09,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:09,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:09,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:09,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:09,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,019 WARN L205 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 147 [2021-06-05 05:05:10,020 INFO L628 ElimStorePlain]: treesize reduction 2773, result has 15.1 percent of original size [2021-06-05 05:05:10,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:10,028 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,231 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 05:05:10,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:10,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:10,239 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,430 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 05:05:10,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:10,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:10,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,627 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 05:05:10,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:10,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:05:10,634 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,821 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 05:05:10,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:10,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:05:10,828 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,013 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 05:05:11,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:11,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:11,020 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,200 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 05:05:11,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:11,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:11,207 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,387 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 05:05:11,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:11,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:11,393 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,566 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 05:05:11,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:11,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:11,572 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,743 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:05:11,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1580 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1572 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1582 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1574 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1584 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1576 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1586 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1578 vanished before elimination [2021-06-05 05:05:11,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1588 vanished before elimination [2021-06-05 05:05:11,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-06-05 05:05:11,750 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 30 variables, input treesize:3421, output treesize:346 [2021-06-05 05:05:12,047 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 05:05:12,288 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 05:05:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:12,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787851556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:12,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:12,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:12,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35662260] [2021-06-05 05:05:12,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:12,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:12,449 INFO L87 Difference]: Start difference. First operand 450 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,016 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2021-06-05 05:05:13,754 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 199 [2021-06-05 05:05:14,139 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 05:05:14,754 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-06-05 05:05:15,531 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2021-06-05 05:05:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:15,546 INFO L93 Difference]: Finished difference Result 632 states and 1852 transitions. [2021-06-05 05:05:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:15,547 INFO L225 Difference]: With dead ends: 632 [2021-06-05 05:05:15,547 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 05:05:15,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4483.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:05:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 05:05:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 456. [2021-06-05 05:05:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.0923076923076924) internal successors, (1407), 455 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1407 transitions. [2021-06-05 05:05:15,552 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1407 transitions. Word has length 20 [2021-06-05 05:05:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:15,552 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1407 transitions. [2021-06-05 05:05:15,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1407 transitions. [2021-06-05 05:05:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:15,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:15,553 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:15,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8625,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:15,753 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:15,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1252797548, now seen corresponding path program 76 times [2021-06-05 05:05:15,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:15,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738717053] [2021-06-05 05:05:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:16,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738717053] [2021-06-05 05:05:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738717053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767344740] [2021-06-05 05:05:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:16,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:16,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:05:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:16,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:05:16,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:16,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:16,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:16,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:16,738 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:05:16,746 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,071 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 05:05:17,071 INFO L628 ElimStorePlain]: treesize reduction 394, result has 46.4 percent of original size [2021-06-05 05:05:17,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:17,076 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:17,081 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:17,086 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,336 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 05:05:17,337 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:05:17,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:17,342 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:17,347 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:17,351 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,555 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 05:05:17,555 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:05:17,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:05:17,562 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:841, output treesize:228 [2021-06-05 05:05:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:18,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767344740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:18,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:18,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:18,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389374416] [2021-06-05 05:05:18,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:18,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:18,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:18,333 INFO L87 Difference]: Start difference. First operand 456 states and 1407 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:18,877 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 05:05:19,233 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 120 [2021-06-05 05:05:19,781 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 133 [2021-06-05 05:05:20,145 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 05:05:20,554 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 77 [2021-06-05 05:05:21,020 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 84 [2021-06-05 05:05:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:21,051 INFO L93 Difference]: Finished difference Result 633 states and 1858 transitions. [2021-06-05 05:05:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:21,052 INFO L225 Difference]: With dead ends: 633 [2021-06-05 05:05:21,052 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 05:05:21,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3438.1ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:05:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 05:05:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 453. [2021-06-05 05:05:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.088495575221239) internal successors, (1396), 452 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1396 transitions. [2021-06-05 05:05:21,057 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1396 transitions. Word has length 20 [2021-06-05 05:05:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:21,057 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1396 transitions. [2021-06-05 05:05:21,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1396 transitions. [2021-06-05 05:05:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:21,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:21,057 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:21,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8818 [2021-06-05 05:05:21,258 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash -998472254, now seen corresponding path program 77 times [2021-06-05 05:05:21,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:21,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123218929] [2021-06-05 05:05:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123218929] [2021-06-05 05:05:21,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123218929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:21,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531951253] [2021-06-05 05:05:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:21,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:21,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:05:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:21,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:21,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:21,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:21,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:21,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:21,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:05:21,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:21,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:21,852 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:05:21,857 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:21,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:21,865 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,869 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,874 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,879 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:21,884 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:21,889 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:05:21,893 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,898 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,903 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,908 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:05:21,913 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,917 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:21,922 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,927 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,931 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,936 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,940 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:21,944 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:21,949 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,953 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:21,958 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:21,962 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:21,966 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:21,971 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:22,142 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 05:05:22,142 INFO L628 ElimStorePlain]: treesize reduction 303, result has 39.0 percent of original size [2021-06-05 05:05:22,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:05:22,144 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1729, output treesize:194 [2021-06-05 05:05:22,474 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 05:05:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:22,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531951253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:22,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:22,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:05:22,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038273689] [2021-06-05 05:05:22,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:05:22,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:22,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:05:22,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:22,794 INFO L87 Difference]: Start difference. First operand 453 states and 1396 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:23,490 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-06-05 05:05:23,925 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 92 [2021-06-05 05:05:24,399 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 99 [2021-06-05 05:05:24,592 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 05:05:24,800 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 05:05:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:24,821 INFO L93 Difference]: Finished difference Result 613 states and 1814 transitions. [2021-06-05 05:05:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:24,822 INFO L225 Difference]: With dead ends: 613 [2021-06-05 05:05:24,822 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 05:05:24,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2643.7ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:05:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 05:05:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 450. [2021-06-05 05:05:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.084632516703786) internal successors, (1385), 449 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1385 transitions. [2021-06-05 05:05:24,827 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1385 transitions. Word has length 20 [2021-06-05 05:05:24,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:24,827 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1385 transitions. [2021-06-05 05:05:24,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1385 transitions. [2021-06-05 05:05:24,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:24,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:24,828 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:25,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8923,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:25,028 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash 213400338, now seen corresponding path program 78 times [2021-06-05 05:05:25,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:25,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60193299] [2021-06-05 05:05:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:25,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:25,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60193299] [2021-06-05 05:05:25,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60193299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:25,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988652252] [2021-06-05 05:05:25,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:25,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:05:25,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:05:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:25,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:25,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:05:25,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:25,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:25,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:25,865 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:05:25,870 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,135 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 05:05:26,135 INFO L628 ElimStorePlain]: treesize reduction 331, result has 48.8 percent of original size [2021-06-05 05:05:26,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:26,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:26,145 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:26,157 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,351 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 05:05:26,352 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:05:26,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:26,356 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:26,360 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:05:26,364 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:26,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:05:26,464 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:805, output treesize:217 [2021-06-05 05:05:26,797 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-06-05 05:05:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:27,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988652252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:27,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:27,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:27,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917332447] [2021-06-05 05:05:27,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:27,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:27,223 INFO L87 Difference]: Start difference. First operand 450 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,995 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 127 [2021-06-05 05:05:28,503 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 136 [2021-06-05 05:05:28,742 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-05 05:05:29,051 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2021-06-05 05:05:29,582 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 89 [2021-06-05 05:05:29,877 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 84 [2021-06-05 05:05:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:29,883 INFO L93 Difference]: Finished difference Result 636 states and 1861 transitions. [2021-06-05 05:05:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:05:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:29,884 INFO L225 Difference]: With dead ends: 636 [2021-06-05 05:05:29,884 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 05:05:29,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3303.4ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:05:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 05:05:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 454. [2021-06-05 05:05:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.0927152317880795) internal successors, (1401), 453 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1401 transitions. [2021-06-05 05:05:29,889 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1401 transitions. Word has length 20 [2021-06-05 05:05:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:29,889 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1401 transitions. [2021-06-05 05:05:29,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1401 transitions. [2021-06-05 05:05:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:29,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:29,890 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:30,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8958,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:30,090 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1353684174, now seen corresponding path program 79 times [2021-06-05 05:05:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:30,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734980568] [2021-06-05 05:05:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:30,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:30,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734980568] [2021-06-05 05:05:30,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734980568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:30,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184429550] [2021-06-05 05:05:30,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:30,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:05:30,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:30,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:30,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:30,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:30,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:30,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:30,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:05:30,686 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:30,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,694 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:30,699 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:05:30,703 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:30,707 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:30,711 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,716 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,720 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,724 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:30,728 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:30,733 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:05:30,737 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,741 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,746 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,750 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:05:30,755 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,759 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:30,763 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,768 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,772 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,776 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,780 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:05:30,785 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:05:30,789 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,793 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:30,797 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:30,801 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:30,805 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:05:30,809 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:30,970 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 05:05:30,970 INFO L628 ElimStorePlain]: treesize reduction 303, result has 39.0 percent of original size [2021-06-05 05:05:30,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:05:30,972 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1729, output treesize:194 [2021-06-05 05:05:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:31,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184429550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:31,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:31,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:31,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294498861] [2021-06-05 05:05:31,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:31,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:31,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:31,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:31,426 INFO L87 Difference]: Start difference. First operand 454 states and 1401 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:32,104 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-05 05:05:32,650 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 91 [2021-06-05 05:05:32,858 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 05:05:33,482 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 05:05:34,198 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-06-05 05:05:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:34,221 INFO L93 Difference]: Finished difference Result 643 states and 1879 transitions. [2021-06-05 05:05:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:34,222 INFO L225 Difference]: With dead ends: 643 [2021-06-05 05:05:34,222 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 05:05:34,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3243.3ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:05:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 05:05:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 452. [2021-06-05 05:05:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0864745011086474) internal successors, (1392), 451 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1392 transitions. [2021-06-05 05:05:34,227 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1392 transitions. Word has length 20 [2021-06-05 05:05:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:34,227 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1392 transitions. [2021-06-05 05:05:34,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1392 transitions. [2021-06-05 05:05:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:34,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:34,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:34,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9062 [2021-06-05 05:05:34,428 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1422244324, now seen corresponding path program 80 times [2021-06-05 05:05:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:34,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385831131] [2021-06-05 05:05:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:34,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:34,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385831131] [2021-06-05 05:05:34,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385831131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:34,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164514833] [2021-06-05 05:05:34,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:34,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:34,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:34,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:05:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:35,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:35,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,393 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 05:05:35,394 INFO L628 ElimStorePlain]: treesize reduction 170, result has 67.2 percent of original size [2021-06-05 05:05:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:35,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:35,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,548 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:05:35,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:35,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:35,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,686 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:05:35,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:35,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:35,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,810 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 05:05:35,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:35,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:35,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:35,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,924 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 05:05:35,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:35,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:35,929 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:36,035 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 05:05:36,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:36,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:05:36,041 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:525, output treesize:238 [2021-06-05 05:05:36,256 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 05:05:36,580 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 05:05:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:36,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164514833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:36,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:36,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:36,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915506065] [2021-06-05 05:05:36,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:36,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:36,880 INFO L87 Difference]: Start difference. First operand 452 states and 1392 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:37,740 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 122 [2021-06-05 05:05:38,279 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 131 [2021-06-05 05:05:39,166 WARN L205 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 141 [2021-06-05 05:05:39,353 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-05 05:05:39,586 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2021-06-05 05:05:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:39,612 INFO L93 Difference]: Finished difference Result 606 states and 1799 transitions. [2021-06-05 05:05:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:05:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:39,613 INFO L225 Difference]: With dead ends: 606 [2021-06-05 05:05:39,613 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 05:05:39,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3297.5ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:05:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 05:05:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 450. [2021-06-05 05:05:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.084632516703786) internal successors, (1385), 449 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1385 transitions. [2021-06-05 05:05:39,618 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1385 transitions. Word has length 20 [2021-06-05 05:05:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:39,618 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1385 transitions. [2021-06-05 05:05:39,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1385 transitions. [2021-06-05 05:05:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:39,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:39,619 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:39,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9095,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:39,819 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 937121676, now seen corresponding path program 81 times [2021-06-05 05:05:39,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:39,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972824503] [2021-06-05 05:05:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:40,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:40,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972824503] [2021-06-05 05:05:40,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972824503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:40,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758521170] [2021-06-05 05:05:40,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:40,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:05:40,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:05:40,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:40,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:40,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:40,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:40,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,653 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-06-05 05:05:40,653 INFO L628 ElimStorePlain]: treesize reduction 155, result has 68.8 percent of original size [2021-06-05 05:05:40,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:40,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:40,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,775 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 05:05:40,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:40,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:40,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,888 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:05:40,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:40,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:40,893 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,995 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 05:05:40,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:41,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:41,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:41,001 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:41,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:41,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:41,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:41,109 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:41,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:41,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:05:41,214 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:525, output treesize:234 [2021-06-05 05:05:41,386 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 98 [2021-06-05 05:05:41,869 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 103 [2021-06-05 05:05:42,735 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2021-06-05 05:05:43,251 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2021-06-05 05:05:43,718 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2021-06-05 05:05:44,031 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2021-06-05 05:05:44,519 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1658, v_prenex_1660, get_6, v_prenex_1670, v_prenex_1662, v_prenex_1650, v_prenex_1664, v_prenex_1652, v_prenex_1666, v_prenex_1654, v_prenex_1668, v_prenex_1656], 1=[v_prenex_1659, v_prenex_1669, v_prenex_1671, v_prenex_1651, v_prenex_1661, v_prenex_1653, v_prenex_1663, v_prenex_1655, get_0, v_prenex_1665, v_prenex_1657, v_prenex_1667]} [2021-06-05 05:05:44,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:44,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:44,884 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 99 [2021-06-05 05:05:44,885 INFO L628 ElimStorePlain]: treesize reduction 977, result has 22.9 percent of original size [2021-06-05 05:05:44,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:44,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:44,993 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 05:05:44,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:45,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,104 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:05:45,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:45,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:45,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:45,210 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1662 vanished before elimination [2021-06-05 05:05:45,210 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1650 vanished before elimination [2021-06-05 05:05:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:45,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,320 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 05:05:45,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:45,320 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1652 vanished before elimination [2021-06-05 05:05:45,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:45,325 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:45,425 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1654 vanished before elimination [2021-06-05 05:05:45,425 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1668 vanished before elimination [2021-06-05 05:05:45,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:45,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1659 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1669 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1671 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1651 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1661 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1653 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1663 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1655 vanished before elimination [2021-06-05 05:05:45,527 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:05:45,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1665 vanished before elimination [2021-06-05 05:05:45,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1657 vanished before elimination [2021-06-05 05:05:45,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1667 vanished before elimination [2021-06-05 05:05:45,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 05:05:45,532 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 36 variables, input treesize:1275, output treesize:187 [2021-06-05 05:05:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:45,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758521170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:45,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:45,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:45,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84533297] [2021-06-05 05:05:45,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:45,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:45,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:45,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:45,735 INFO L87 Difference]: Start difference. First operand 450 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:46,120 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 136 [2021-06-05 05:05:46,628 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 147 [2021-06-05 05:05:47,848 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 238 DAG size of output: 207 [2021-06-05 05:05:48,016 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 05:05:49,260 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 255 DAG size of output: 215 [2021-06-05 05:05:49,465 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-06-05 05:05:50,728 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 259 DAG size of output: 196 [2021-06-05 05:05:50,943 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-06-05 05:05:52,327 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 270 DAG size of output: 203 [2021-06-05 05:05:52,648 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-06-05 05:05:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:52,689 INFO L93 Difference]: Finished difference Result 922 states and 2733 transitions. [2021-06-05 05:05:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:05:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:05:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:52,691 INFO L225 Difference]: With dead ends: 922 [2021-06-05 05:05:52,691 INFO L226 Difference]: Without dead ends: 889 [2021-06-05 05:05:52,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 7546.7ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:05:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-05 05:05:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 454. [2021-06-05 05:05:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.088300220750552) internal successors, (1399), 453 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1399 transitions. [2021-06-05 05:05:52,697 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1399 transitions. Word has length 20 [2021-06-05 05:05:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:52,697 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1399 transitions. [2021-06-05 05:05:52,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1399 transitions. [2021-06-05 05:05:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:05:52,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:52,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:52,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9173 [2021-06-05 05:05:52,898 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 844201320, now seen corresponding path program 82 times [2021-06-05 05:05:52,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:52,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831549999] [2021-06-05 05:05:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:53,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831549999] [2021-06-05 05:05:53,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831549999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913631394] [2021-06-05 05:05:53,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:53,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:53,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:53,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:53,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:05:53,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:53,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:53,945 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 112 [2021-06-05 05:05:53,945 INFO L628 ElimStorePlain]: treesize reduction 173, result has 69.5 percent of original size [2021-06-05 05:05:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:53,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:53,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:53,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,119 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 05:05:54,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:54,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:54,126 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:54,132 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,268 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 05:05:54,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:54,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:05:54,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,407 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:05:54,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:54,413 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,544 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:05:54,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:54,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:05:54,550 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,680 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:05:54,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:54,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:05:54,687 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:597, output treesize:298 [2021-06-05 05:05:54,907 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2021-06-05 05:05:55,252 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 05:05:55,636 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 96 [2021-06-05 05:05:56,037 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_1730, v_prenex_1698, v_prenex_1720, v_prenex_1712, v_prenex_1701, v_prenex_1722, v_prenex_1703, v_prenex_1725, v_prenex_1735, v_prenex_1705, v_prenex_1727, v_prenex_1715, v_prenex_1707, v_prenex_1718, v_prenex_1709], 1=[v_prenex_1710, get_0, v_prenex_1721, v_prenex_1731, v_prenex_1723, v_prenex_1700, v_prenex_1736, v_prenex_1702, v_prenex_1713, v_prenex_1704, v_prenex_1726, v_prenex_1706, v_prenex_1728, v_prenex_1717, v_prenex_1708, v_prenex_1719]} [2021-06-05 05:05:56,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:56,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:56,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:05:56,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:05:56,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:56,616 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 122 [2021-06-05 05:05:56,616 INFO L628 ElimStorePlain]: treesize reduction 1212, result has 24.1 percent of original size [2021-06-05 05:05:56,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1730 vanished before elimination [2021-06-05 05:05:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:56,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:56,767 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 05:05:56,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:56,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1720 vanished before elimination [2021-06-05 05:05:56,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:56,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:56,914 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 05:05:56,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:56,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:57,059 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 05:05:57,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:57,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:57,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:57,203 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 05:05:57,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:57,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:05:57,209 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:57,343 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 05:05:57,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:57,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1725 vanished before elimination [2021-06-05 05:05:57,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1735 vanished before elimination [2021-06-05 05:05:57,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1705 vanished before elimination [2021-06-05 05:05:57,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1727 vanished before elimination [2021-06-05 05:05:57,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1715 vanished before elimination [2021-06-05 05:05:57,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:57,349 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:57,480 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:05:57,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:57,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:05:57,487 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:57,615 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:05:57,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1709 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1710 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1721 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1731 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1723 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1700 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1736 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1702 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1713 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1704 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1726 vanished before elimination [2021-06-05 05:05:57,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1706 vanished before elimination [2021-06-05 05:05:57,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1728 vanished before elimination [2021-06-05 05:05:57,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1717 vanished before elimination [2021-06-05 05:05:57,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1708 vanished before elimination [2021-06-05 05:05:57,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1719 vanished before elimination [2021-06-05 05:05:57,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 32 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 05:05:57,621 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 48 variables, input treesize:1707, output treesize:278 [2021-06-05 05:05:57,831 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-06-05 05:05:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:57,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913631394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:57,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:57,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:57,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411990461] [2021-06-05 05:05:57,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:57,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:57,964 INFO L87 Difference]: Start difference. First operand 454 states and 1399 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:58,310 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 124 [2021-06-05 05:05:58,823 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2021-06-05 05:05:59,438 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 139 [2021-06-05 05:05:59,592 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 05:06:00,374 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 175 [2021-06-05 05:06:00,649 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-06-05 05:06:01,252 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 158 [2021-06-05 05:06:01,396 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 05:06:02,244 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 167 [2021-06-05 05:06:02,399 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 05:06:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:02,425 INFO L93 Difference]: Finished difference Result 906 states and 2631 transitions. [2021-06-05 05:06:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:02,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:02,426 INFO L225 Difference]: With dead ends: 906 [2021-06-05 05:06:02,426 INFO L226 Difference]: Without dead ends: 864 [2021-06-05 05:06:02,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5482.4ms TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:06:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-06-05 05:06:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 462. [2021-06-05 05:06:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0954446854663775) internal successors, (1427), 461 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1427 transitions. [2021-06-05 05:06:02,432 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1427 transitions. Word has length 20 [2021-06-05 05:06:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:02,432 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1427 transitions. [2021-06-05 05:06:02,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1427 transitions. [2021-06-05 05:06:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:02,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:02,433 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:02,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9321,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:02,633 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 637193638, now seen corresponding path program 83 times [2021-06-05 05:06:02,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:02,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674179452] [2021-06-05 05:06:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:03,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:03,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674179452] [2021-06-05 05:06:03,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674179452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:03,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153862054] [2021-06-05 05:06:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:03,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:06:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:03,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:03,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:03,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:03,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:03,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:03,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:03,183 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:03,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:03,191 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,195 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:03,200 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:03,204 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,208 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:03,211 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:03,215 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,219 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:03,223 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:03,227 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:03,231 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,235 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,239 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,243 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:06:03,247 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,251 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,255 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,259 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,263 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:06:03,267 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:03,271 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,275 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:03,279 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:03,282 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:03,286 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,289 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:03,292 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,412 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 05:06:03,413 INFO L628 ElimStorePlain]: treesize reduction 258, result has 36.6 percent of original size [2021-06-05 05:06:03,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:06:03,414 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:06:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:03,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153862054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:03,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:03,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:06:03,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503414305] [2021-06-05 05:06:03,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:03,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:03,910 INFO L87 Difference]: Start difference. First operand 462 states and 1427 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:04,352 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2021-06-05 05:06:04,775 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2021-06-05 05:06:05,244 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 86 [2021-06-05 05:06:05,792 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 94 [2021-06-05 05:06:06,447 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 109 [2021-06-05 05:06:07,237 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 112 [2021-06-05 05:06:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:07,253 INFO L93 Difference]: Finished difference Result 823 states and 2383 transitions. [2021-06-05 05:06:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:06:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:07,254 INFO L225 Difference]: With dead ends: 823 [2021-06-05 05:06:07,254 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 05:06:07,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3812.2ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:06:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 05:06:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 464. [2021-06-05 05:06:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.09719222462203) internal successors, (1434), 463 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1434 transitions. [2021-06-05 05:06:07,260 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1434 transitions. Word has length 20 [2021-06-05 05:06:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:07,260 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1434 transitions. [2021-06-05 05:06:07,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1434 transitions. [2021-06-05 05:06:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:07,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:07,261 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:07,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9452 [2021-06-05 05:06:07,477 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -581441722, now seen corresponding path program 84 times [2021-06-05 05:06:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:07,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225236312] [2021-06-05 05:06:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:07,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:07,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225236312] [2021-06-05 05:06:07,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225236312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:07,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977871223] [2021-06-05 05:06:07,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:07,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:06:07,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:06:07,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:07,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:07,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:07,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:07,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:07,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:07,974 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:07,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:07,982 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:07,986 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:07,990 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:07,994 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:07,998 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:08,002 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:08,006 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:08,010 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:08,014 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:08,018 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:08,022 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:08,026 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:08,030 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:08,034 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:08,038 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:06:08,042 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:08,046 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:08,050 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:08,054 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:08,058 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:08,061 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:08,065 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:08,069 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:06:08,075 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:08,079 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:08,083 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:08,086 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:08,090 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:08,094 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:08,097 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,215 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 05:06:08,215 INFO L628 ElimStorePlain]: treesize reduction 258, result has 36.6 percent of original size [2021-06-05 05:06:08,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:06:08,217 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:06:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:08,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977871223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:08,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:08,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224523772] [2021-06-05 05:06:08,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:08,694 INFO L87 Difference]: Start difference. First operand 464 states and 1434 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:08,964 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 05:06:09,394 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 05:06:09,538 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 05:06:09,905 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2021-06-05 05:06:10,047 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 05:06:10,485 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 05:06:10,665 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 05:06:11,149 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2021-06-05 05:06:11,350 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-06-05 05:06:11,915 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2021-06-05 05:06:12,110 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-05 05:06:12,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:12,126 INFO L93 Difference]: Finished difference Result 952 states and 2721 transitions. [2021-06-05 05:06:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:12,127 INFO L225 Difference]: With dead ends: 952 [2021-06-05 05:06:12,127 INFO L226 Difference]: Without dead ends: 914 [2021-06-05 05:06:12,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3827.9ms TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:06:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-06-05 05:06:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 466. [2021-06-05 05:06:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0946236559139786) internal successors, (1439), 465 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1439 transitions. [2021-06-05 05:06:12,134 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1439 transitions. Word has length 20 [2021-06-05 05:06:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:12,134 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1439 transitions. [2021-06-05 05:06:12,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1439 transitions. [2021-06-05 05:06:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:12,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:12,134 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:12,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9479 [2021-06-05 05:06:12,335 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:12,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:12,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2058431408, now seen corresponding path program 85 times [2021-06-05 05:06:12,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:12,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423240228] [2021-06-05 05:06:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:12,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423240228] [2021-06-05 05:06:12,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423240228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315177861] [2021-06-05 05:06:12,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:12,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:06:12,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:12,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:12,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,038 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-05 05:06:13,038 INFO L628 ElimStorePlain]: treesize reduction 155, result has 66.2 percent of original size [2021-06-05 05:06:13,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:13,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,147 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:06:13,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:13,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:13,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:13,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,257 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:06:13,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:13,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:13,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:13,367 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:13,372 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:13,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:13,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:13,474 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:13,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:06:13,557 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:06:13,708 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:06:13,882 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-06-05 05:06:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:14,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315177861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:14,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:14,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:14,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797381785] [2021-06-05 05:06:14,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:14,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:14,443 INFO L87 Difference]: Start difference. First operand 466 states and 1439 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:14,727 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 05:06:15,172 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2021-06-05 05:06:15,678 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2021-06-05 05:06:15,836 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 05:06:16,245 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 123 [2021-06-05 05:06:16,436 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 05:06:16,909 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 131 [2021-06-05 05:06:17,103 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-05 05:06:17,635 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 138 [2021-06-05 05:06:17,839 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 05:06:18,088 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-06-05 05:06:18,413 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 119 [2021-06-05 05:06:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:18,414 INFO L93 Difference]: Finished difference Result 1129 states and 3177 transitions. [2021-06-05 05:06:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:06:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:18,415 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 05:06:18,415 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 05:06:18,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4504.6ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:06:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 05:06:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 478. [2021-06-05 05:06:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.0838574423480085) internal successors, (1471), 477 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1471 transitions. [2021-06-05 05:06:18,422 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1471 transitions. Word has length 20 [2021-06-05 05:06:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:18,422 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1471 transitions. [2021-06-05 05:06:18,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1471 transitions. [2021-06-05 05:06:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:18,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:18,423 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:18,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9504,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:18,623 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1744944628, now seen corresponding path program 86 times [2021-06-05 05:06:18,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:18,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445112654] [2021-06-05 05:06:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:18,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:18,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445112654] [2021-06-05 05:06:18,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445112654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:18,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793333922] [2021-06-05 05:06:18,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:18,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:06:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:19,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:06:19,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:19,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:19,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:19,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:19,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:06:19,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,689 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 05:06:19,689 INFO L628 ElimStorePlain]: treesize reduction 375, result has 48.6 percent of original size [2021-06-05 05:06:19,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:19,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:19,700 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:19,704 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,918 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 05:06:19,918 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:06:19,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:19,923 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:19,928 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:19,932 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:20,033 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 05:06:20,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:20,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:06:20,039 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:895, output treesize:251 [2021-06-05 05:06:20,364 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 05:06:20,728 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 05:06:21,012 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2021-06-05 05:06:21,256 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1790, v_prenex_1792, get_6, v_prenex_1780, v_prenex_1794, v_prenex_1796, v_prenex_1774, v_prenex_1784, v_prenex_1776, v_prenex_1786, v_prenex_1800, v_prenex_1788], 1=[v_prenex_1801, v_prenex_1781, v_prenex_1791, v_prenex_1793, v_prenex_1785, v_prenex_1795, get_0, v_prenex_1787, v_prenex_1797, v_prenex_1775, v_prenex_1789, v_prenex_1777]} [2021-06-05 05:06:21,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:21,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:21,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:21,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,633 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 92 [2021-06-05 05:06:21,633 INFO L628 ElimStorePlain]: treesize reduction 889, result has 23.6 percent of original size [2021-06-05 05:06:21,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1792 vanished before elimination [2021-06-05 05:06:21,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:06:21,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:21,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1780 vanished before elimination [2021-06-05 05:06:21,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1794 vanished before elimination [2021-06-05 05:06:21,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:06:21,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:21,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1774 vanished before elimination [2021-06-05 05:06:21,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1784 vanished before elimination [2021-06-05 05:06:21,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:06:21,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:21,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1786 vanished before elimination [2021-06-05 05:06:21,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:06:21,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:22,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:22,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:06:22,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:22,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:22,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1801 vanished before elimination [2021-06-05 05:06:22,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1781 vanished before elimination [2021-06-05 05:06:22,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1791 vanished before elimination [2021-06-05 05:06:22,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1793 vanished before elimination [2021-06-05 05:06:22,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1785 vanished before elimination [2021-06-05 05:06:22,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1795 vanished before elimination [2021-06-05 05:06:22,138 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:06:22,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1787 vanished before elimination [2021-06-05 05:06:22,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1797 vanished before elimination [2021-06-05 05:06:22,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1775 vanished before elimination [2021-06-05 05:06:22,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1789 vanished before elimination [2021-06-05 05:06:22,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1777 vanished before elimination [2021-06-05 05:06:22,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 05:06:22,142 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 36 variables, input treesize:1271, output treesize:187 [2021-06-05 05:06:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:22,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793333922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:22,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:22,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:22,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314590900] [2021-06-05 05:06:22,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:22,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:22,324 INFO L87 Difference]: Start difference. First operand 478 states and 1471 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:22,723 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 114 [2021-06-05 05:06:23,318 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 157 [2021-06-05 05:06:23,965 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 181 [2021-06-05 05:06:25,034 WARN L205 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 189 [2021-06-05 05:06:26,031 WARN L205 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 176 [2021-06-05 05:06:27,084 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 194 DAG size of output: 185 [2021-06-05 05:06:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:27,103 INFO L93 Difference]: Finished difference Result 882 states and 2579 transitions. [2021-06-05 05:06:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:06:27,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:27,104 INFO L225 Difference]: With dead ends: 882 [2021-06-05 05:06:27,104 INFO L226 Difference]: Without dead ends: 855 [2021-06-05 05:06:27,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 5567.6ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:06:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-06-05 05:06:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 481. [2021-06-05 05:06:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.08125) internal successors, (1479), 480 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1479 transitions. [2021-06-05 05:06:27,111 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1479 transitions. Word has length 20 [2021-06-05 05:06:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:27,111 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1479 transitions. [2021-06-05 05:06:27,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1479 transitions. [2021-06-05 05:06:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:27,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:27,111 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:27,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9582,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:27,312 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1265659952, now seen corresponding path program 87 times [2021-06-05 05:06:27,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:27,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298810710] [2021-06-05 05:06:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:27,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:27,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298810710] [2021-06-05 05:06:27,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298810710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:27,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342939029] [2021-06-05 05:06:27,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:27,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:06:27,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:27,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:06:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:27,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:27,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:27,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,186 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-05 05:06:28,186 INFO L628 ElimStorePlain]: treesize reduction 155, result has 66.2 percent of original size [2021-06-05 05:06:28,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:28,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:28,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,298 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:06:28,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:28,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:28,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:28,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:28,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:28,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:28,501 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:28,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:28,593 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:28,597 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:28,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:06:28,683 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:06:28,835 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:06:29,014 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-06-05 05:06:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:29,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342939029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:29,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:29,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:29,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225709672] [2021-06-05 05:06:29,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:29,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:29,609 INFO L87 Difference]: Start difference. First operand 481 states and 1479 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:29,873 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 05:06:30,344 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 112 [2021-06-05 05:06:30,479 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 05:06:30,842 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2021-06-05 05:06:31,027 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-05 05:06:31,473 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 127 [2021-06-05 05:06:31,673 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 05:06:32,151 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-06-05 05:06:32,368 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2021-06-05 05:06:32,919 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 140 [2021-06-05 05:06:33,141 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 05:06:33,531 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 130 [2021-06-05 05:06:33,915 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 136 [2021-06-05 05:06:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:33,916 INFO L93 Difference]: Finished difference Result 1142 states and 3217 transitions. [2021-06-05 05:06:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:06:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:33,917 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 05:06:33,917 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 05:06:33,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 5017.6ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:06:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 05:06:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 487. [2021-06-05 05:06:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.0823045267489713) internal successors, (1498), 486 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1498 transitions. [2021-06-05 05:06:33,924 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1498 transitions. Word has length 20 [2021-06-05 05:06:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:33,924 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1498 transitions. [2021-06-05 05:06:33,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1498 transitions. [2021-06-05 05:06:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:33,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:33,925 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:34,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9710,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:34,125 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1330586956, now seen corresponding path program 88 times [2021-06-05 05:06:34,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:34,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084949677] [2021-06-05 05:06:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:34,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:34,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084949677] [2021-06-05 05:06:34,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084949677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:34,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699797858] [2021-06-05 05:06:34,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:34,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:34,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:34,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:06:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:34,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:34,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:34,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:34,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:34,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:34,830 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:34,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:34,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:34,842 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:34,846 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:34,850 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:34,861 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:34,865 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,870 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,874 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,878 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,883 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:34,887 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,891 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:34,895 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,899 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,903 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,906 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:06:34,910 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:34,914 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,918 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,921 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:34,925 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,929 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,933 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:06:34,937 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,940 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:34,944 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,947 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:34,951 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:34,954 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:34,957 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:35,080 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 05:06:35,080 INFO L628 ElimStorePlain]: treesize reduction 248, result has 37.5 percent of original size [2021-06-05 05:06:35,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:06:35,081 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:06:35,320 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 05:06:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:35,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699797858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:35,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:35,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:35,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210595408] [2021-06-05 05:06:35,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:35,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:35,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:35,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:35,671 INFO L87 Difference]: Start difference. First operand 487 states and 1498 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:36,125 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 05:06:36,629 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2021-06-05 05:06:37,103 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2021-06-05 05:06:37,723 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 98 [2021-06-05 05:06:38,588 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 105 [2021-06-05 05:06:39,369 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 119 [2021-06-05 05:06:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:39,392 INFO L93 Difference]: Finished difference Result 883 states and 2591 transitions. [2021-06-05 05:06:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:06:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:39,394 INFO L225 Difference]: With dead ends: 883 [2021-06-05 05:06:39,394 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 05:06:39,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 4447.4ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:06:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 05:06:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 478. [2021-06-05 05:06:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.090146750524109) internal successors, (1474), 477 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1474 transitions. [2021-06-05 05:06:39,400 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1474 transitions. Word has length 20 [2021-06-05 05:06:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:39,400 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1474 transitions. [2021-06-05 05:06:39,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1474 transitions. [2021-06-05 05:06:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:39,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:39,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:39,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9805 [2021-06-05 05:06:39,601 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -647803412, now seen corresponding path program 89 times [2021-06-05 05:06:39,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:39,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432879375] [2021-06-05 05:06:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:39,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:39,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432879375] [2021-06-05 05:06:39,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432879375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:39,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863255694] [2021-06-05 05:06:39,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:39,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:39,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:06:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:40,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:40,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:40,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,044 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:40,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,053 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,058 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:06:40,067 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:06:40,072 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:40,077 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:40,082 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,086 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,091 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:40,096 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,100 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:40,105 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,109 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:40,114 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:06:40,118 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:40,123 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:40,127 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,132 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:40,137 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:40,142 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:40,146 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:06:40,151 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,155 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:40,159 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:40,164 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:06:40,168 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:40,172 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:06:40,176 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,365 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-06-05 05:06:40,366 INFO L628 ElimStorePlain]: treesize reduction 347, result has 39.9 percent of original size [2021-06-05 05:06:40,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:06:40,368 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1873, output treesize:230 [2021-06-05 05:06:40,900 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 05:06:41,077 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-05 05:06:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:41,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863255694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:41,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:41,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:06:41,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559965157] [2021-06-05 05:06:41,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:41,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:41,172 INFO L87 Difference]: Start difference. First operand 478 states and 1474 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:41,544 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 05:06:41,906 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 05:06:42,031 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 05:06:42,447 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 05:06:42,643 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-05 05:06:43,209 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-06-05 05:06:43,514 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 05:06:43,859 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-06-05 05:06:44,376 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 100 [2021-06-05 05:06:44,503 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 05:06:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:44,523 INFO L93 Difference]: Finished difference Result 955 states and 2769 transitions. [2021-06-05 05:06:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:44,525 INFO L225 Difference]: With dead ends: 955 [2021-06-05 05:06:44,525 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 05:06:44,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3971.2ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:06:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 05:06:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 484. [2021-06-05 05:06:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.0973084886128364) internal successors, (1496), 483 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1496 transitions. [2021-06-05 05:06:44,531 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1496 transitions. Word has length 20 [2021-06-05 05:06:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:44,531 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1496 transitions. [2021-06-05 05:06:44,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1496 transitions. [2021-06-05 05:06:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:44,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:44,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:44,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9829,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:44,732 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:44,732 INFO L82 PathProgramCache]: Analyzing trace with hash -854811094, now seen corresponding path program 90 times [2021-06-05 05:06:44,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:44,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306920318] [2021-06-05 05:06:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:45,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:45,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306920318] [2021-06-05 05:06:45,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306920318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:45,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798036874] [2021-06-05 05:06:45,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:45,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:06:45,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:06:45,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:45,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:45,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:06:45,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:45,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:45,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:45,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:06:45,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,616 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 05:06:45,616 INFO L628 ElimStorePlain]: treesize reduction 354, result has 45.5 percent of original size [2021-06-05 05:06:45,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:45,621 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:45,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:45,630 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,814 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 05:06:45,815 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:06:45,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:45,820 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:45,830 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:45,834 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,983 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 05:06:45,984 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 05:06:45,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:06:45,989 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:751, output treesize:183 [2021-06-05 05:06:46,449 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2021-06-05 05:06:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:46,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798036874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:46,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:46,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:46,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670019945] [2021-06-05 05:06:46,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:46,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:46,907 INFO L87 Difference]: Start difference. First operand 484 states and 1496 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:47,604 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 119 [2021-06-05 05:06:48,203 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 119 [2021-06-05 05:06:48,935 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 128 [2021-06-05 05:06:49,611 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 138 [2021-06-05 05:06:50,320 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 147 [2021-06-05 05:06:51,149 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 154 [2021-06-05 05:06:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:51,167 INFO L93 Difference]: Finished difference Result 857 states and 2484 transitions. [2021-06-05 05:06:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:06:51,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:51,168 INFO L225 Difference]: With dead ends: 857 [2021-06-05 05:06:51,168 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 05:06:51,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4780.2ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:06:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 05:06:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 486. [2021-06-05 05:06:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.0989690721649485) internal successors, (1503), 485 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1503 transitions. [2021-06-05 05:06:51,174 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1503 transitions. Word has length 20 [2021-06-05 05:06:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:51,174 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1503 transitions. [2021-06-05 05:06:51,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1503 transitions. [2021-06-05 05:06:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:51,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:51,175 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:51,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9867,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:51,375 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2073446454, now seen corresponding path program 91 times [2021-06-05 05:06:51,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:51,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365553269] [2021-06-05 05:06:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:51,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:51,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365553269] [2021-06-05 05:06:51,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365553269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:51,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096500413] [2021-06-05 05:06:51,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:06:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:52,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,321 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-05 05:06:52,321 INFO L628 ElimStorePlain]: treesize reduction 155, result has 66.2 percent of original size [2021-06-05 05:06:52,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:52,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,430 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:06:52,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:52,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:52,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,547 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:06:52,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:52,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:52,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:52,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:52,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:52,665 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:52,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:52,758 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:52,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:06:52,844 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:06:52,998 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:06:53,631 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 05:06:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096500413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:53,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:53,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:53,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509037031] [2021-06-05 05:06:53,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:53,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:53,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:53,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:53,801 INFO L87 Difference]: Start difference. First operand 486 states and 1503 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:54,357 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 113 [2021-06-05 05:06:54,770 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 114 [2021-06-05 05:06:55,411 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 123 [2021-06-05 05:06:55,865 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 129 [2021-06-05 05:06:56,353 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 140 [2021-06-05 05:06:56,919 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 151 [2021-06-05 05:06:57,431 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 154 [2021-06-05 05:06:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:57,441 INFO L93 Difference]: Finished difference Result 834 states and 2443 transitions. [2021-06-05 05:06:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:06:57,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:06:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:57,443 INFO L225 Difference]: With dead ends: 834 [2021-06-05 05:06:57,443 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 05:06:57,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 4382.1ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:06:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 05:06:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 484. [2021-06-05 05:06:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.0973084886128364) internal successors, (1496), 483 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1496 transitions. [2021-06-05 05:06:57,449 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1496 transitions. Word has length 20 [2021-06-05 05:06:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:57,449 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1496 transitions. [2021-06-05 05:06:57,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1496 transitions. [2021-06-05 05:06:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:06:57,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:57,449 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:57,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9970,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:57,650 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash -51697496, now seen corresponding path program 92 times [2021-06-05 05:06:57,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:57,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833966309] [2021-06-05 05:06:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:58,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833966309] [2021-06-05 05:06:58,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833966309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:58,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845906986] [2021-06-05 05:06:58,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:58,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:58,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:58,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:06:58,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:58,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:06:58,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:58,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:06:58,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:06:58,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:58,605 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:06:58,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,939 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-06-05 05:06:58,939 INFO L628 ElimStorePlain]: treesize reduction 403, result has 48.1 percent of original size [2021-06-05 05:06:58,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:58,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:06:58,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:58,954 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,092 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 05:06:59,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:59,098 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:06:59,107 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:06:59,111 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,364 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 05:06:59,364 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:06:59,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:06:59,371 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:949, output treesize:296 [2021-06-05 05:06:59,585 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2021-06-05 05:06:59,770 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 05:07:00,321 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 139 [2021-06-05 05:07:00,640 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 116 [2021-06-05 05:07:01,031 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1878, get_6, v_prenex_1880, v_prenex_1882, v_prenex_1884, v_prenex_1886, v_prenex_1888, v_prenex_1876], 1=[v_prenex_1879, v_prenex_1889, v_prenex_1881, v_prenex_1883, get_0, v_prenex_1885, v_prenex_1877, v_prenex_1887]} [2021-06-05 05:07:01,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:01,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:01,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:07:01,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:07:01,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:01,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:01,099 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,763 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 125 [2021-06-05 05:07:01,764 INFO L628 ElimStorePlain]: treesize reduction 2067, result has 16.1 percent of original size [2021-06-05 05:07:01,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:07:01,770 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,917 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 05:07:01,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:01,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:01,924 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,069 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 05:07:02,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:02,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,226 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 05:07:02,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:02,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:07:02,232 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,370 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 05:07:02,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:02,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:07:02,376 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,510 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 05:07:02,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:02,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:02,516 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,649 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:07:02,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:02,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:02,655 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,785 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 05:07:02,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:02,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1879 vanished before elimination [2021-06-05 05:07:02,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1889 vanished before elimination [2021-06-05 05:07:02,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1881 vanished before elimination [2021-06-05 05:07:02,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1883 vanished before elimination [2021-06-05 05:07:02,786 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:07:02,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1885 vanished before elimination [2021-06-05 05:07:02,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1877 vanished before elimination [2021-06-05 05:07:02,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1887 vanished before elimination [2021-06-05 05:07:02,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 16 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 05:07:02,790 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 24 variables, input treesize:2641, output treesize:276 [2021-06-05 05:07:03,004 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 05:07:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:03,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845906986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:03,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:03,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:03,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000324829] [2021-06-05 05:07:03,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:03,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:03,136 INFO L87 Difference]: Start difference. First operand 484 states and 1496 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:03,819 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 143 [2021-06-05 05:07:04,352 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 149 [2021-06-05 05:07:05,548 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 280 DAG size of output: 240 [2021-06-05 05:07:06,925 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 305 DAG size of output: 245 [2021-06-05 05:07:07,167 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-05 05:07:07,726 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 166 [2021-06-05 05:07:07,965 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-06-05 05:07:08,584 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 175 [2021-06-05 05:07:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:08,614 INFO L93 Difference]: Finished difference Result 827 states and 2453 transitions. [2021-06-05 05:07:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:07:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:08,615 INFO L225 Difference]: With dead ends: 827 [2021-06-05 05:07:08,615 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 05:07:08,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 6794.7ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:07:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 05:07:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 487. [2021-06-05 05:07:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.094650205761317) internal successors, (1504), 486 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1504 transitions. [2021-06-05 05:07:08,621 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1504 transitions. Word has length 20 [2021-06-05 05:07:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:08,621 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1504 transitions. [2021-06-05 05:07:08,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1504 transitions. [2021-06-05 05:07:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:08,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:08,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:08,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10040,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:08,822 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:08,822 INFO L82 PathProgramCache]: Analyzing trace with hash -367808852, now seen corresponding path program 93 times [2021-06-05 05:07:08,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:08,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490414439] [2021-06-05 05:07:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:09,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490414439] [2021-06-05 05:07:09,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490414439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137917065] [2021-06-05 05:07:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:09,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:07:09,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:09,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:07:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:09,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:09,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:09,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:09,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,758 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-05 05:07:09,758 INFO L628 ElimStorePlain]: treesize reduction 140, result has 67.9 percent of original size [2021-06-05 05:07:09,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:09,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:09,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,869 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 05:07:09,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:09,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:09,874 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:09,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:09,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:09,979 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:10,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:10,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:10,066 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:10,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:10,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:10,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:10,151 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:10,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:10,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:07:10,236 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:07:10,391 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:07:10,759 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-05 05:07:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:11,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137917065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:11,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:11,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:11,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951807698] [2021-06-05 05:07:11,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:11,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:11,234 INFO L87 Difference]: Start difference. First operand 487 states and 1504 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:11,791 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2021-06-05 05:07:12,355 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 120 [2021-06-05 05:07:13,140 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 139 [2021-06-05 05:07:13,590 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 138 [2021-06-05 05:07:14,044 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 143 [2021-06-05 05:07:14,596 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 150 [2021-06-05 05:07:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:14,613 INFO L93 Difference]: Finished difference Result 835 states and 2452 transitions. [2021-06-05 05:07:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:07:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:14,614 INFO L225 Difference]: With dead ends: 835 [2021-06-05 05:07:14,614 INFO L226 Difference]: Without dead ends: 814 [2021-06-05 05:07:14,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 4117.9ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:07:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-06-05 05:07:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 490. [2021-06-05 05:07:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.0920245398773005) internal successors, (1512), 489 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1512 transitions. [2021-06-05 05:07:14,620 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1512 transitions. Word has length 20 [2021-06-05 05:07:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:14,620 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1512 transitions. [2021-06-05 05:07:14,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1512 transitions. [2021-06-05 05:07:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:14,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:14,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:14,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10196,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:14,821 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:14,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2066529240, now seen corresponding path program 94 times [2021-06-05 05:07:14,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:14,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122176890] [2021-06-05 05:07:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:15,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:15,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122176890] [2021-06-05 05:07:15,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122176890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:15,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658638782] [2021-06-05 05:07:15,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:15,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:07:15,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:15,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:15,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:15,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:15,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:15,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:15,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:15,886 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-06-05 05:07:15,887 INFO L628 ElimStorePlain]: treesize reduction 110, result has 74.5 percent of original size [2021-06-05 05:07:15,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:15,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:15,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:15,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,019 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 05:07:16,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:16,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:16,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:16,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,139 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 05:07:16,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:16,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:16,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:16,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,261 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 05:07:16,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:16,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:16,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:16,267 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,381 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 05:07:16,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:16,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:16,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:16,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:16,387 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:16,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:16,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,503 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 05:07:16,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:16,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:07:16,510 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:537, output treesize:247 [2021-06-05 05:07:16,710 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 05:07:16,891 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 05:07:17,184 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-06-05 05:07:17,517 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1923, v_prenex_1925, v_prenex_1927, get_6, v_prenex_1917, v_prenex_1919, v_prenex_1921], 1=[v_prenex_1922, v_prenex_1924, v_prenex_1926, v_prenex_1918, v_prenex_1928, get_0, v_prenex_1920]} [2021-06-05 05:07:17,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:07:17,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:17,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:07:17,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:17,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 05:07:17,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:17,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 05:07:17,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:17,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 05:07:17,579 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,116 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 104 [2021-06-05 05:07:18,116 INFO L628 ElimStorePlain]: treesize reduction 1756, result has 16.8 percent of original size [2021-06-05 05:07:18,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:07:18,123 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,262 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 05:07:18,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:18,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,409 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 05:07:18,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:18,416 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,557 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:07:18,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:07:18,563 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,707 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 05:07:18,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:18,718 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,844 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 05:07:18,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:07:18,849 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,972 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 05:07:18,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1922 vanished before elimination [2021-06-05 05:07:18,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1924 vanished before elimination [2021-06-05 05:07:18,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1926 vanished before elimination [2021-06-05 05:07:18,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1918 vanished before elimination [2021-06-05 05:07:18,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1928 vanished before elimination [2021-06-05 05:07:18,972 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:07:18,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1920 vanished before elimination [2021-06-05 05:07:18,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:07:18,976 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 21 variables, input treesize:2293, output treesize:253 [2021-06-05 05:07:19,304 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 05:07:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:19,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658638782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:19,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:19,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:19,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048340090] [2021-06-05 05:07:19,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:19,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:19,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:19,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:19,466 INFO L87 Difference]: Start difference. First operand 490 states and 1512 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:20,118 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 123 [2021-06-05 05:07:20,623 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 127 [2021-06-05 05:07:21,536 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 143 [2021-06-05 05:07:22,276 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 145 [2021-06-05 05:07:23,103 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 155 [2021-06-05 05:07:24,039 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 166 [2021-06-05 05:07:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:24,069 INFO L93 Difference]: Finished difference Result 812 states and 2410 transitions. [2021-06-05 05:07:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:07:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:24,073 INFO L225 Difference]: With dead ends: 812 [2021-06-05 05:07:24,074 INFO L226 Difference]: Without dead ends: 797 [2021-06-05 05:07:24,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5453.1ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:07:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-06-05 05:07:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 484. [2021-06-05 05:07:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.0973084886128364) internal successors, (1496), 483 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1496 transitions. [2021-06-05 05:07:24,079 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1496 transitions. Word has length 20 [2021-06-05 05:07:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:24,079 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1496 transitions. [2021-06-05 05:07:24,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1496 transitions. [2021-06-05 05:07:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:24,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:24,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:24,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10291,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:24,281 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:24,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1043679718, now seen corresponding path program 95 times [2021-06-05 05:07:24,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:24,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132265557] [2021-06-05 05:07:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:24,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:24,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132265557] [2021-06-05 05:07:24,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132265557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:24,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081650614] [2021-06-05 05:07:24,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:24,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:07:24,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:24,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:07:24,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:24,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:24,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:07:24,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:24,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:24,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:24,763 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:24,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:24,771 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:24,775 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:24,779 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:07:24,783 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:24,787 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:24,791 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,795 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,799 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:24,803 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,807 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,811 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:07:24,815 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:24,819 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,823 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,827 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,831 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,834 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:24,838 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,842 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:24,846 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,850 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:07:24,854 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,857 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:24,861 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:24,864 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:24,868 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:24,871 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,991 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 05:07:24,991 INFO L628 ElimStorePlain]: treesize reduction 268, result has 35.7 percent of original size [2021-06-05 05:07:24,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:07:24,993 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:07:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081650614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:25,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:25,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 05:07:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312298246] [2021-06-05 05:07:25,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:07:25,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:25,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:07:25,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:07:25,498 INFO L87 Difference]: Start difference. First operand 484 states and 1496 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:25,987 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-05 05:07:26,525 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2021-06-05 05:07:26,740 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-05 05:07:27,220 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2021-06-05 05:07:27,797 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2021-06-05 05:07:28,487 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 112 [2021-06-05 05:07:28,708 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 05:07:29,442 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 119 [2021-06-05 05:07:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:29,481 INFO L93 Difference]: Finished difference Result 980 states and 2882 transitions. [2021-06-05 05:07:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:07:29,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:29,482 INFO L225 Difference]: With dead ends: 980 [2021-06-05 05:07:29,482 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 05:07:29,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 4181.2ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:07:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 05:07:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 487. [2021-06-05 05:07:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.1049382716049383) internal successors, (1509), 486 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1509 transitions. [2021-06-05 05:07:29,489 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1509 transitions. Word has length 20 [2021-06-05 05:07:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:29,489 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1509 transitions. [2021-06-05 05:07:29,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1509 transitions. [2021-06-05 05:07:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:29,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:29,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:29,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10422 [2021-06-05 05:07:29,690 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:29,692 INFO L82 PathProgramCache]: Analyzing trace with hash -174955642, now seen corresponding path program 96 times [2021-06-05 05:07:29,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:29,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773784695] [2021-06-05 05:07:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:29,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773784695] [2021-06-05 05:07:29,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773784695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714740868] [2021-06-05 05:07:29,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:29,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:07:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:30,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:07:30,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:30,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:30,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:30,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:30,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:30,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:30,125 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:30,129 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:30,137 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:30,141 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,145 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:30,149 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:30,153 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,157 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:07:30,161 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:30,165 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:30,183 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,187 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,191 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,196 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:07:30,200 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,204 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,208 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,213 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,217 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:07:30,222 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:07:30,226 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,231 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:30,235 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:07:30,240 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:30,244 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,249 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:30,253 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:30,377 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 05:07:30,377 INFO L628 ElimStorePlain]: treesize reduction 258, result has 36.6 percent of original size [2021-06-05 05:07:30,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:07:30,379 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:07:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:30,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714740868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:30,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:30,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:30,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933622081] [2021-06-05 05:07:30,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:30,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:30,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:30,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:30,871 INFO L87 Difference]: Start difference. First operand 487 states and 1509 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:31,323 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 05:07:31,622 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 05:07:32,056 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2021-06-05 05:07:32,516 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 88 [2021-06-05 05:07:33,285 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 95 [2021-06-05 05:07:34,171 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 108 [2021-06-05 05:07:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:34,191 INFO L93 Difference]: Finished difference Result 904 states and 2607 transitions. [2021-06-05 05:07:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:07:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:34,193 INFO L225 Difference]: With dead ends: 904 [2021-06-05 05:07:34,193 INFO L226 Difference]: Without dead ends: 889 [2021-06-05 05:07:34,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3603.4ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:07:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-05 05:07:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 485. [2021-06-05 05:07:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.103305785123967) internal successors, (1502), 484 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1502 transitions. [2021-06-05 05:07:34,199 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1502 transitions. Word has length 20 [2021-06-05 05:07:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:34,199 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1502 transitions. [2021-06-05 05:07:34,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1502 transitions. [2021-06-05 05:07:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:34,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:34,200 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:34,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:34,400 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2032740266, now seen corresponding path program 97 times [2021-06-05 05:07:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:34,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832294356] [2021-06-05 05:07:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:34,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:34,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832294356] [2021-06-05 05:07:34,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832294356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:34,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741110397] [2021-06-05 05:07:34,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:07:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:35,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:35,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:35,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:35,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,322 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-06-05 05:07:35,322 INFO L628 ElimStorePlain]: treesize reduction 140, result has 67.9 percent of original size [2021-06-05 05:07:35,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:35,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:35,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:35,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:35,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:35,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:35,529 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:35,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:35,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:35,700 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:35,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:07:35,783 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-06-05 05:07:35,943 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 05:07:36,415 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 05:07:36,589 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-05 05:07:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:36,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741110397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:36,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:36,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:36,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016532880] [2021-06-05 05:07:36,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:36,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:36,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:36,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:36,723 INFO L87 Difference]: Start difference. First operand 485 states and 1502 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:37,290 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 113 [2021-06-05 05:07:37,711 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117 [2021-06-05 05:07:38,143 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 127 [2021-06-05 05:07:38,821 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 136 [2021-06-05 05:07:39,546 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 142 [2021-06-05 05:07:40,381 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 151 [2021-06-05 05:07:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:40,399 INFO L93 Difference]: Finished difference Result 905 states and 2610 transitions. [2021-06-05 05:07:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:07:40,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:40,401 INFO L225 Difference]: With dead ends: 905 [2021-06-05 05:07:40,401 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 05:07:40,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4366.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:07:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 05:07:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 488. [2021-06-05 05:07:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.106776180698152) internal successors, (1513), 487 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1513 transitions. [2021-06-05 05:07:40,407 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1513 transitions. Word has length 20 [2021-06-05 05:07:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:40,407 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1513 transitions. [2021-06-05 05:07:40,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1513 transitions. [2021-06-05 05:07:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:40,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:40,408 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:40,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10477,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:40,608 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 862551270, now seen corresponding path program 98 times [2021-06-05 05:07:40,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:40,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390306603] [2021-06-05 05:07:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:41,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:41,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390306603] [2021-06-05 05:07:41,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390306603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:41,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505458801] [2021-06-05 05:07:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:41,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:07:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:41,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:07:41,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:41,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:41,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:07:41,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:07:41,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,051 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 05:07:42,051 INFO L628 ElimStorePlain]: treesize reduction 427, result has 45.8 percent of original size [2021-06-05 05:07:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:42,057 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:42,062 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:42,066 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,295 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 05:07:42,296 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-06-05 05:07:42,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:42,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:42,306 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:42,310 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,516 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 05:07:42,516 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-06-05 05:07:42,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:07:42,524 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:895, output treesize:259 [2021-06-05 05:07:42,814 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 05:07:43,022 INFO L446 ElimStorePlain]: Different costs {0=[get_6, v_prenex_1970, v_prenex_1980, v_prenex_1972, v_prenex_1982, v_prenex_1974, v_prenex_1995, v_prenex_1984, v_prenex_1976, v_prenex_1964, v_prenex_1986, v_prenex_1978, v_prenex_1966, v_prenex_1968], 1=[v_prenex_1981, v_prenex_1983, v_prenex_1971, v_prenex_1996, v_prenex_1985, get_0, v_prenex_1973, v_prenex_1965, v_prenex_1987, v_prenex_1975, v_prenex_1967, v_prenex_1977, v_prenex_1969, v_prenex_1979]} [2021-06-05 05:07:43,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:43,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:43,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:07:43,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:43,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:43,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:43,522 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-06-05 05:07:43,522 INFO L628 ElimStorePlain]: treesize reduction 1053, result has 25.7 percent of original size [2021-06-05 05:07:43,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:43,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:43,671 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 05:07:43,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:43,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1980 vanished before elimination [2021-06-05 05:07:43,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:07:43,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:43,824 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 05:07:43,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:43,825 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1982 vanished before elimination [2021-06-05 05:07:43,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:07:43,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:43,966 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 05:07:43,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:43,967 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1995 vanished before elimination [2021-06-05 05:07:43,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:43,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,109 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 05:07:44,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:44,109 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1976 vanished before elimination [2021-06-05 05:07:44,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:44,114 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,248 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 05:07:44,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:44,248 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1986 vanished before elimination [2021-06-05 05:07:44,248 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1978 vanished before elimination [2021-06-05 05:07:44,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:07:44,253 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,383 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 05:07:44,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:44,383 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1968 vanished before elimination [2021-06-05 05:07:44,383 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1981 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1983 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1971 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1996 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1985 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1973 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1965 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1987 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1975 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1967 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1977 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1969 vanished before elimination [2021-06-05 05:07:44,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1979 vanished before elimination [2021-06-05 05:07:44,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 28 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:07:44,389 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 42 variables, input treesize:1527, output treesize:254 [2021-06-05 05:07:44,521 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 05:07:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:44,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505458801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:44,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:44,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:44,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996923519] [2021-06-05 05:07:44,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:44,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:44,892 INFO L87 Difference]: Start difference. First operand 488 states and 1513 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:45,543 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 133 [2021-06-05 05:07:46,047 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 140 [2021-06-05 05:07:46,816 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 149 [2021-06-05 05:07:47,515 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 164 [2021-06-05 05:07:47,862 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 83 [2021-06-05 05:07:48,586 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 169 [2021-06-05 05:07:48,927 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 80 [2021-06-05 05:07:49,071 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-06-05 05:07:49,869 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 176 [2021-06-05 05:07:50,099 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 66 [2021-06-05 05:07:50,609 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 115 [2021-06-05 05:07:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:50,615 INFO L93 Difference]: Finished difference Result 1000 states and 2843 transitions. [2021-06-05 05:07:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:07:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:50,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:50,617 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 05:07:50,617 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 05:07:50,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 6445.6ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:07:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 05:07:50,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 500. [2021-06-05 05:07:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.096192384769539) internal successors, (1545), 499 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:50,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1545 transitions. [2021-06-05 05:07:50,623 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1545 transitions. Word has length 20 [2021-06-05 05:07:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:50,623 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1545 transitions. [2021-06-05 05:07:50,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1545 transitions. [2021-06-05 05:07:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:50,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:50,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:50,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10548 [2021-06-05 05:07:50,824 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash 845614218, now seen corresponding path program 99 times [2021-06-05 05:07:50,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:50,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937524187] [2021-06-05 05:07:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:51,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:51,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937524187] [2021-06-05 05:07:51,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937524187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:51,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209040945] [2021-06-05 05:07:51,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:51,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:07:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:07:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:51,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:51,757 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-06-05 05:07:51,758 INFO L628 ElimStorePlain]: treesize reduction 164, result has 66.8 percent of original size [2021-06-05 05:07:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:51,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:51,893 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 05:07:51,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:51,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:51,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:51,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:51,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,022 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:07:52,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:07:52,028 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:52,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,137 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 05:07:52,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:52,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:52,142 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,245 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 05:07:52,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:52,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:07:52,250 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:52,255 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:52,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-06-05 05:07:52,359 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:501, output treesize:220 [2021-06-05 05:07:52,532 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-06-05 05:07:53,358 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2030, v_prenex_2022, v_prenex_2012, v_prenex_2020, get_6, v_prenex_2032, v_prenex_2010, v_prenex_2026, v_prenex_2016, v_prenex_2024, v_prenex_2036, v_prenex_2014, v_prenex_2028, v_prenex_2018], 1=[v_prenex_2033, v_prenex_2011, v_prenex_2023, v_prenex_2031, v_prenex_2021, v_prenex_2037, v_prenex_2015, v_prenex_2027, v_prenex_2013, v_prenex_2025, v_prenex_2019, get_0, v_prenex_2017, v_prenex_2029]} [2021-06-05 05:07:53,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:53,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:53,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:07:53,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:07:53,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:53,892 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 105 [2021-06-05 05:07:53,893 INFO L628 ElimStorePlain]: treesize reduction 1085, result has 24.8 percent of original size [2021-06-05 05:07:53,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:53,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,049 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 05:07:54,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,049 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2012 vanished before elimination [2021-06-05 05:07:54,049 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2020 vanished before elimination [2021-06-05 05:07:54,049 INFO L518 ElimStorePlain]: Eliminatee get_6 vanished before elimination [2021-06-05 05:07:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:07:54,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,199 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 05:07:54,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,200 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2010 vanished before elimination [2021-06-05 05:07:54,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:07:54,206 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,345 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 05:07:54,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,346 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2016 vanished before elimination [2021-06-05 05:07:54,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:54,351 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,494 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 05:07:54,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 05:07:54,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,635 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 05:07:54,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:54,640 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,773 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 05:07:54,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 05:07:54,778 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,909 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 05:07:54,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2018 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2033 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2011 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2023 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2031 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2021 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2037 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2015 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2027 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2013 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2025 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2019 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2017 vanished before elimination [2021-06-05 05:07:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2029 vanished before elimination [2021-06-05 05:07:54,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 28 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 05:07:54,914 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 42 variables, input treesize:1471, output treesize:254 [2021-06-05 05:07:55,047 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 05:07:55,290 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 05:07:55,453 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-06-05 05:07:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:55,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209040945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:55,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:55,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:55,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786072217] [2021-06-05 05:07:55,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:55,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:55,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:55,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:55,539 INFO L87 Difference]: Start difference. First operand 500 states and 1545 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:56,101 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 118 [2021-06-05 05:07:56,528 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 122 [2021-06-05 05:07:57,005 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 134 [2021-06-05 05:07:57,820 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 148 [2021-06-05 05:07:58,452 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 158 [2021-06-05 05:07:59,190 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 167 [2021-06-05 05:07:59,863 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 172 [2021-06-05 05:07:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:59,876 INFO L93 Difference]: Finished difference Result 885 states and 2569 transitions. [2021-06-05 05:07:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:07:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:07:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:59,877 INFO L225 Difference]: With dead ends: 885 [2021-06-05 05:07:59,877 INFO L226 Difference]: Without dead ends: 870 [2021-06-05 05:07:59,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 5103.9ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:07:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-06-05 05:07:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 500. [2021-06-05 05:07:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.096192384769539) internal successors, (1545), 499 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1545 transitions. [2021-06-05 05:07:59,883 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1545 transitions. Word has length 20 [2021-06-05 05:07:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:59,883 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1545 transitions. [2021-06-05 05:07:59,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1545 transitions. [2021-06-05 05:07:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:07:59,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:59,884 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:00,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10686,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:00,084 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:00,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1985898054, now seen corresponding path program 100 times [2021-06-05 05:08:00,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:00,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653509734] [2021-06-05 05:08:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:00,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:00,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653509734] [2021-06-05 05:08:00,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653509734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:00,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999536237] [2021-06-05 05:08:00,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:00,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:00,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:08:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:00,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:08:00,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:08:00,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:08:00,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:08:00,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:08:00,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:08:00,466 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:08:00,470 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:08:00,474 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,479 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:08:00,483 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:08:00,487 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,496 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:08:00,500 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:08:00,505 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,509 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:08:00,514 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:08:00,518 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:08:00,523 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,527 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,531 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,535 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 05:08:00,539 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,543 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,547 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,551 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,555 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:08:00,560 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:08:00,563 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,567 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:08:00,571 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:08:00,574 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:08:00,578 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,581 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:08:00,585 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,706 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 05:08:00,706 INFO L628 ElimStorePlain]: treesize reduction 258, result has 36.6 percent of original size [2021-06-05 05:08:00,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 05:08:00,708 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 1 variables, input treesize:1549, output treesize:149 [2021-06-05 05:08:01,016 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-05 05:08:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:01,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999536237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:01,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:01,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:08:01,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226053561] [2021-06-05 05:08:01,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:08:01,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:01,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:08:01,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:08:01,268 INFO L87 Difference]: Start difference. First operand 500 states and 1545 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:01,704 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-05 05:08:01,982 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-05 05:08:02,414 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2021-06-05 05:08:02,918 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 87 Received shutdown request... [2021-06-05 05:08:03,378 WARN L222 SmtUtils]: Removed 6 from assertion stack [2021-06-05 05:08:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:08:03,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10786 [2021-06-05 05:08:03,579 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:08:03,580 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:08:03,581 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:08:03,582 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:08:03 BasicIcfg [2021-06-05 05:08:03,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:08:03,582 INFO L168 Benchmark]: Toolchain (without parser) took 805081.48 ms. Allocated memory was 358.6 MB in the beginning and 625.0 MB in the end (delta: 266.3 MB). Free memory was 338.2 MB in the beginning and 334.1 MB in the end (delta: 4.1 MB). Peak memory consumption was 271.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:03,582 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory was 339.5 MB in the beginning and 339.5 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:08:03,582 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.61 ms. Allocated memory is still 358.6 MB. Free memory was 338.1 MB in the beginning and 336.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:08:03,582 INFO L168 Benchmark]: Boogie Preprocessor took 12.03 ms. Allocated memory is still 358.6 MB. Free memory was 336.5 MB in the beginning and 335.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:03,582 INFO L168 Benchmark]: RCFGBuilder took 370.69 ms. Allocated memory is still 358.6 MB. Free memory was 335.5 MB in the beginning and 336.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:03,582 INFO L168 Benchmark]: TraceAbstraction took 804670.96 ms. Allocated memory was 358.6 MB in the beginning and 625.0 MB in the end (delta: 266.3 MB). Free memory was 335.6 MB in the beginning and 334.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 268.9 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:03,582 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory was 339.5 MB in the beginning and 339.5 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.61 ms. Allocated memory is still 358.6 MB. Free memory was 338.1 MB in the beginning and 336.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.03 ms. Allocated memory is still 358.6 MB. Free memory was 336.5 MB in the beginning and 335.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 370.69 ms. Allocated memory is still 358.6 MB. Free memory was 335.5 MB in the beginning and 336.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 804670.96 ms. Allocated memory was 358.6 MB in the beginning and 625.0 MB in the end (delta: 266.3 MB). Free memory was 335.6 MB in the beginning and 334.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 268.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 122]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (500states) and FLOYD_HOARE automaton (currently 9 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 131 for 394ms.. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (500states) and FLOYD_HOARE automaton (currently 9 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 131 for 394ms.. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (500states) and FLOYD_HOARE automaton (currently 9 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 131 for 394ms.. - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (500states) and FLOYD_HOARE automaton (currently 9 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 131 for 394ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 804602.1ms, OverallIterations: 492, TraceHistogramMax: 1, EmptinessCheckTime: 194.4ms, AutomataDifference: 402458.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25153 SDtfs, 48337 SDslu, 117238 SDs, 0 SdLazy, 97318 SolverSat, 4761 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54034.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11835 GetRequests, 4743 SyntacticMatches, 303 SemanticMatches, 6788 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11172 ImplicationChecksByTransitivity, 465890.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=500occurred in iteration=490, InterpolantAutomatonStates: 4228, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1866.6ms AutomataMinimizationTime, 491 MinimizatonAttempts, 91747 StatesRemovedByMinimization, 489 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1312.1ms SsaConstructionTime, 3254.7ms SatisfiabilityAnalysisTime, 327695.8ms InterpolantComputationTime, 14828 NumberOfCodeBlocks, 14828 NumberOfCodeBlocksAsserted, 1016 NumberOfCheckSat, 14035 ConstructedInterpolants, 541 QuantifiedInterpolants, 314572 SizeOfPredicates, 2238 NumberOfNonLiveVariables, 21981 ConjunctsInSsa, 4535 ConjunctsInUnsatCore, 793 InterpolantComputations, 191 PerfectInterpolantSequences, 296/1370 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown